WBCHSE HS ENVS cheat sheet

Environment = sum of biotic (living) and abiotic (non-living: light, temperature, water, soil, air) components interacting with an organism; ecology is the study of these interactions.

Levels of ecological organisation in order: organism → population → community → ecosystem → landscape → biome → biosphere.

Habitat is where an organism lives; niche is its functional role (resource use, tolerance range, activity time). Two species cannot occupy an identical niche indefinitely (Gause's competitive exclusion principle).

Population growth: exponential dN/dt = rN; logistic dN/dt = rN(K − N)/K, where K = carrying capacity and r = intrinsic rate of increase.

Species interactions: mutualism (+,+), commensalism (+,0), parasitism (+,−), predation (+,−), competition (−,−), amensalism (−,0).

Law of tolerance (Shelford): each species survives within a range of an environmental factor bounded by minimum, optimum and maximum; the limiting factor is the one nearest its tolerance limit.

Energy flow is unidirectional: sunlight → producers → consumers → decomposers, with roughly 10% transfer between trophic levels (Lindeman's 10% law).

Biogeochemical cycles are gaseous (carbon, nitrogen, oxygen) or sedimentary (phosphorus, sulphur); nitrogen fixation, nitrification, denitrification are microbial steps of the N cycle.

Ecological succession: primary succession starts on bare substrate (lithosere → hydrosere), secondary succession follows disturbance; pioneer species give way to a climax community.

Resources are classified as renewable (solar, wind, water, biomass, soil fertility) and non-renewable (fossil fuels, minerals, metal ores); renewable does not mean unlimited - use must stay below regeneration rate.

Forest cover is reported as forest cover as a percentage of geographic area; India's National Forest Policy (1988) target is 33% of geographical area under forest and tree cover.

Soil erosion types: sheet, rill, gully, splash and wind erosion; conservation measures include contour ploughing, terracing, strip cropping, shelter belts and check dams.

Water resources: only about 2.5% of global water is freshwater and most of that is locked in ice and groundwater; rainwater harvesting and watershed management raise usable supply.

Energy resources: conventional (coal, petroleum, natural gas, nuclear) versus non-conventional (solar, wind, tidal, geothermal, biogas, hydrogen fuel cell).

Fossil fuels are finite and carbon-intensive; energy conservation measures include efficient lighting, cogeneration, and demand-side management.

Mineral resources are non-renewable; recycling, substitution and reduced overburden generation extend reserves. Overexploitation causes land subsidence and mine spoil.

Biodiversity-based resources (food, medicine, timber, fibre) are conserved through in-situ (protected areas, sacred groves) and ex-situ (botanical gardens, seed banks, zoos) methods.

Resource conflict arises when use rate exceeds regeneration or when waste assimilation capacity is exceeded; sustainable harvest = annual increment for renewable resources.

Ecosystem = biotic community + abiotic environment interacting as a functional unit; components are producers, consumers, decomposers and abiotic matter.

Four functional aspects: productivity (primary and secondary), decomposition (fragmentation, leaching, catabolism, humification, mineralisation), energy flow and nutrient cycling.

Primary productivity: gross primary productivity (GPP) minus respiration equals net primary productivity (NPP); NPP supports all consumers.

Ecological pyramids: numbers, biomass and energy. Energy pyramids are always upright; number and biomass pyramids may be inverted (e.g., a single tree supporting many insects).

Aquatic ecosystem zonation: littoral, limnetic, profundal, benthic zones in lakes; photic and aphotic zones in oceans; estuaries are nutrient-rich transition zones.

Wetlands provide flood buffering, groundwater recharge, sediment trapping and habitat; they are recognised as ecosystems of high productivity.

Grasslands and forests differ in stratification, root depth and fire dependence; grasslands store most carbon below ground.

Ecosystem services are provisioning (food, water), regulating (climate, flood control), cultural (recreation, spiritual) and supporting (nutrient cycling, soil formation).

Ecological resilience is the capacity of an ecosystem to return to its original state after disturbance; resistance is the ability to withstand disturbance without change.

Biodiversity has three levels: genetic diversity within species, species diversity between species, and ecosystem diversity of habitats.

India is a megadiverse country with four global biodiversity hotspots: Himalaya, Indo-Burma, Western Ghats–Sri Lanka and Sundaland (Nicobar Islands).

In-situ conservation: national parks, wildlife sanctuaries, biosphere reserves, community reserves, sacred groves. Ex-situ: zoos, botanical gardens, seed and gene banks, cryopreservation.

IUCN Red List categories: Extinct, Extinct in the Wild, Critically Endangered, Endangered, Vulnerable, Near Threatened, Least Concern, Data Deficient, Not Evaluated.

Threats to biodiversity: habitat loss and fragmentation, invasive alien species, overexploitation, pollution, climate change and disease (the 'evil quartet' plus climate change).

Wildlife (Protection) Act, 1972 provides schedules for protected species and legal protection to national parks and sanctuaries; it was amended in 2022 to align with CITES.

CITES regulates international trade in endangered species through appendices I, II and III; the Convention on Biological Diversity (1992) addresses conservation and sustainable use.

Keystone species have disproportionate influence on community structure (e.g., fig trees, sea otters); flagship species are chosen to mobilise public support; indicator species signal environmental quality.

Inbreeding depression and genetic drift are greater risks in small, isolated populations; corridors and minimum viable population size reduce extinction risk.

Pollutants are classified by origin (natural, anthropogenic), degradability (biodegradable, non-biodegradable) and form (primary, secondary).

Air pollutants: primary (SO2, NOx, CO, particulates, hydrocarbons) and secondary (ozone, PAN, smog). PM2.5 and PM10 are measured as mass concentration in µg/m³.

Air pollution control devices: settling chambers, cyclones (coarse particles), electrostatic precipitators and fabric filters (fine particles), scrubbers (SO2), catalytic converters (CO, NOx, hydrocarbons).

Water quality indicators: BOD (biochemical oxygen demand, oxygen consumed by microbes over 5 days at 20°C), COD, DO, pH, turbidity and coliform count; high BOD indicates organic pollution.

Eutrophication results from excess nitrogen and phosphorus, causing algal blooms, oxygen depletion and fish kills; control by nutrient removal and buffer strips.

Noise is measured in decibels (dB); dB(A) is A-weighted for human hearing; permissible ambient limits differ for residential, commercial and industrial zones and for day/night.

Thermal pollution from cooling-water discharge lowers dissolved oxygen and alters species composition; cooling towers and cooling ponds mitigate it.

Soil pollution from pesticides, heavy metals (Pb, Cd, Hg, As) and plastics; remediation by bioremediation, phytoremediation and soil washing.

Pollution control hierarchy: prevent at source → reduce → reuse → recycle → treat → safe disposal; the 'polluter pays' principle assigns clean-up cost to the polluter.

Waste hierarchy (most to least preferred): prevention, reuse, recycling, recovery (energy), disposal.

Municipal solid waste fractions: biodegradable/organic, recyclable (paper, glass, metal, plastic), inert and hazardous; segregation at source is the key first step.

Solid Waste Management Rules, 2016 require segregation into wet, dry and hazardous waste and mandate decentralised processing of wet waste.

Composting (aerobic) and vermicomposting convert organic waste to manure; anaerobic digestion yields biogas (mainly methane and CO2) plus digestate.

Sanitary landfill design includes a liner, leachate collection, gas venting and daily cover; open dumping causes leachate contamination and methane release.

Biomedical waste is colour-coded (yellow, red, white, blue) under the Biomedical Waste Management Rules, 2016; sharps go to puncture-proof containers.

E-waste contains heavy metals and valuable metals; formal recycling recovers metals and prevents informal acid leaching and open burning.

Circular economy principles: design out waste and pollution, keep products and materials in use, regenerate natural systems; extended producer responsibility (EPR) shifts end-of-life cost to producers.

3R plus 2R extension: Refuse, Reduce, Reuse, Recycle, Rot; life-cycle assessment (LCA) compares impacts from raw material to disposal.

Greenhouse gases: CO2, CH4, N2O, water vapour, CFCs and O3; global warming potential (GWP) is relative to CO2 over a chosen time horizon (GWP-100 of CH4 is about 28).

Enhanced greenhouse effect: human emissions raise radiative forcing, warming the surface and lower atmosphere; the natural greenhouse effect keeps Earth about 33°C warmer than it would otherwise be.

Evidence of warming: rising global mean surface temperature, sea-level rise, glacier retreat, ocean acidification and shifting species ranges.

Ozone depletion is a separate issue: CFCs release chlorine in the stratosphere, catalytically destroying O3; the ozone hole forms over Antarctica in spring.

Montreal Protocol (1987) phased out ozone-depleting substances; the Kigali Amendment extends it to phase down HFCs, which are potent greenhouse gases.

UNFCCC (1992) → Kyoto Protocol (1997, binding targets for developed countries) → Paris Agreement (2015, nationally determined contributions to hold warming well below 2°C, aiming for 1.5°C).

Mitigation reduces emissions (renewables, efficiency, carbon sinks); adaptation reduces vulnerability (embankments, drought-resistant crops, early warning).

Carbon footprint is total GHG emissions expressed as CO2 equivalent; carbon sequestration by forests and soils is a sink.

Ozone in the stratosphere absorbs ultraviolet-B radiation; surface ozone is a pollutant and greenhouse gas, so ozone is 'good up high, bad nearby'.

Brundtland definition (1987): development that meets the needs of the present without compromising the ability of future generations to meet their own needs.

Three pillars of sustainability: environmental, social and economic; the 2030 Agenda sets 17 Sustainable Development Goals (SDGs).

Key principles: precautionary principle, polluter pays principle, public trust doctrine, intergenerational equity, common but differentiated responsibilities (CBDR).

Environmental Impact Assessment (EIA) identifies impacts before project approval; steps include screening, scoping, baseline study, impact prediction, mitigation and public hearing.

Environmental governance instruments: command-and-control (standards, permits), market-based (taxes, tradable permits), and voluntary/information-based (eco-labelling, disclosure).

Indian legal framework: Environment (Protection) Act 1986 (umbrella law), Water Act 1974, Air Act 1981, Forest Conservation Act 1980, Wildlife Protection Act 1972, Biological Diversity Act 2002.

Constitutional basis: Article 48A (state duty to protect environment) and Article 51A(g) (fundamental duty of citizens); the Supreme Court has read a right to a clean environment into Article 21.

National Green Tribunal Act 2010 created a specialised forum for environmental disputes; the CPCB and SPCBs monitor and enforce pollution standards.

International institutions: UNEP, IPCC (assesses climate science), and multilateral environmental agreements such as CBD, UNFCCC and Ramsar Convention (wetlands).

Environmental health links physical, chemical and biological hazards in air, water, soil, food and the workplace to human disease.

Waterborne diseases: cholera, typhoid, dysentery, hepatitis A and E; prevention by safe water, sanitation and chlorination/hand hygiene.

Vector-borne diseases: malaria (Anopheles mosquito), dengue and chikungunya (Aedes aegypti), and Japanese encephalitis (Culex); control by larval source reduction and bed nets.

Air pollution health effects: PM2.5 penetrates alveoli and enters blood; linked to asthma, COPD, cardiovascular disease and lung cancer; CO binds haemoglobin more strongly than oxygen.

Heavy metals: lead affects the nervous system (especially children), mercury causes Minamata disease, cadmium causes Itai-itai disease, and arsenic causes skin lesions and cancer.

Pesticide exposure causes acute poisoning and chronic neuroendocrine effects; organochlorines biomagnify through food chains.

Occupational health hazards include silica dust (silicosis), asbestos (asbestosis, mesothelioma), noise-induced hearing loss and heat stress.

Risk assessment steps: hazard identification, dose–response assessment, exposure assessment and risk characterisation; risk = hazard × exposure.

Food safety relies on the cold chain, hygiene, and limits on pesticide residues and aflatoxins; food fortification addresses micronutrient deficiency.

Disaster = disruption exceeding a community's capacity to cope; risk = hazard × vulnerability ÷ capacity. Reducing vulnerability or increasing capacity reduces risk.

Hazard types: natural (flood, cyclone, earthquake, landslide, drought, tsunami, wildfire) and human-induced (industrial accident, fire, chemical spill, epidemic).

Disaster management cycle: mitigation and prevention → preparedness → response/relief → recovery → rehabilitation and reconstruction, looping back to mitigation.

Sendai Framework for Disaster Risk Reduction (2015–2030) has four priorities, including understanding risk and strengthening governance; it succeeded the Hyogo Framework.

Earthquake magnitude is measured on the Richter/Mw scale (logarithmic); intensity is measured by observed effects (MSK or Modified Mercalli).

Cyclone warning uses colour-coded alerts and the Saffir–Simpson scale; early warning plus evacuation reduces cyclone deaths sharply.

Structural mitigation: embankments, flood walls, earthquake-resistant construction, retrofitting, and land-use zoning; non-structural: building codes, insurance, education, drills.

India's institutional setup: NDMA (national), SDMA (state) and DDMA (district) authorities under the Disaster Management Act, 2005; NDRF conducts specialist response.

First aid and search-and-rescue basics: scene safety, triage by severity, control bleeding, and avoid entering damaged structures without training.

Monitoring types: ambient (background), source (stack/effluent), and biological monitoring (bioindicators such as lichens for SO2, diatoms for water quality).

Air sampling: high-volume sampler for PM10/PM2.5 on filter paper; gas absorbers for SO2 and NOx; results reported in µg/m³ at standard conditions.

Water sampling: collect in clean containers, preserve samples (acid for metals, cool for BOD), record pH, temperature and DO on site; DO and BOD are measured by Winkler titration and 5-day incubation.

Soil testing: pH by pH meter or indicator, organic carbon by Walkley–Black wet oxidation, and texture by feel or hydrometer method.

Quadrat method for vegetation: random quadrats of 1 m × 1 m (herbs) or 10 m × 10 m (trees); record frequency, density, abundance and basal area.

Frequency (%) = (number of quadrats in which species occurs ÷ total quadrats) × 100; density = individuals ÷ total area sampled.

Line transect and point count are standard methods for animal surveys; repeated observations reduce sampling error.

Noise measurement uses a sound level meter in dB(A), with slow response; readings taken at specified distances and times.

Data quality: calibration of instruments, replicates, blanks and controls, and proper recording of date, time, location and observer; results are presented as mean ± standard deviation.

Monitoring types: ambient (background), source (stack/effluent), and biological monitoring (bioindicators such as lichens for SO2, diatoms for water quality).

Air sampling: high-volume sampler for PM10/PM2.5 on filter paper; gas absorbers for SO2 and NOx; results reported in µg/m³ at standard conditions.

Water sampling: collect in clean containers, preserve samples (acid for metals, cool for BOD), record pH, temperature and DO on site; DO and BOD are measured by Winkler titration and 5-day incubation.

Soil testing: pH by pH meter or indicator, organic carbon by Walkley–Black wet oxidation, and texture by feel or hydrometer method.

Quadrat method for vegetation: random quadrats of 1 m × 1 m (herbs) or 10 m × 10 m (trees); record frequency, density, abundance and basal area.

Frequency (%) = (number of quadrats in which species occurs ÷ total quadrats) × 100; density = individuals ÷ total area sampled.

Line transect and point count are standard methods for animal surveys; repeated observations reduce sampling error.

Noise measurement uses a sound level meter in dB(A), with slow response; readings taken at specified distances and times.

Data quality: calibration of instruments, replicates, blanks and controls, and proper recording of date, time, location and observer; results are presented as mean ± standard deviation.

Monitoring types: ambient (background), source (stack/effluent), and biological monitoring (bioindicators such as lichens for SO2, diatoms for water quality).

Air sampling: high-volume sampler for PM10/PM2.5 on filter paper; gas absorbers for SO2 and NOx; results reported in µg/m³ at standard conditions.

Water sampling: collect in clean containers, preserve samples (acid for metals, cool for BOD), record pH, temperature and DO on site; DO and BOD are measured by Winkler titration and 5-day incubation.

Soil testing: pH by pH meter or indicator, organic carbon by Walkley–Black wet oxidation, and texture by feel or hydrometer method.

Quadrat method for vegetation: random quadrats of 1 m × 1 m (herbs) or 10 m × 10 m (trees); record frequency, density, abundance and basal area.

Frequency (%) = (number of quadrats in which species occurs ÷ total quadrats) × 100; density = individuals ÷ total area sampled.

Line transect and point count are standard methods for animal surveys; repeated observations reduce sampling error.

Noise measurement uses a sound level meter in dB(A), with slow response; readings taken at specified distances and times.

Data quality: calibration of instruments, replicates, blanks and controls, and proper recording of date, time, location and observer; results are presented as mean ± standard deviation.

Monitoring types: ambient (background), source (stack/effluent), and biological monitoring (bioindicators such as lichens for SO2, diatoms for water quality).

Air sampling: high-volume sampler for PM10/PM2.5 on filter paper; gas absorbers for SO2 and NOx; results reported in µg/m³ at standard conditions.

Water sampling: collect in clean containers, preserve samples (acid for metals, cool for BOD), record pH, temperature and DO on site; DO and BOD are measured by Winkler titration and 5-day incubation.

Soil testing: pH by pH meter or indicator, organic carbon by Walkley–Black wet oxidation, and texture by feel or hydrometer method.

Quadrat method for vegetation: random quadrats of 1 m × 1 m (herbs) or 10 m × 10 m (trees); record frequency, density, abundance and basal area.

Frequency (%) = (number of quadrats in which species occurs ÷ total quadrats) × 100; density = individuals ÷ total area sampled.

Line transect and point count are standard methods for animal surveys; repeated observations reduce sampling error.

Noise measurement uses a sound level meter in dB(A), with slow response; readings taken at specified distances and times.

Data quality: calibration of instruments, replicates, blanks and controls, and proper recording of date, time, location and observer; results are presented as mean ± standard deviation.

Monitoring types: ambient (background), source (stack/effluent), and biological monitoring (bioindicators such as lichens for SO2, diatoms for water quality).

Air sampling: high-volume sampler for PM10/PM2.5 on filter paper; gas absorbers for SO2 and NOx; results reported in µg/m³ at standard conditions.

Water sampling: collect in clean containers, preserve samples (acid for metals, cool for BOD), record pH, temperature and DO on site; DO and BOD are measured by Winkler titration and 5-day incubation.

Soil testing: pH by pH meter or indicator, organic carbon by Walkley–Black wet oxidation, and texture by feel or hydrometer method.

Quadrat method for vegetation: random quadrats of 1 m × 1 m (herbs) or 10 m × 10 m (trees); record frequency, density, abundance and basal area.

Frequency (%) = (number of quadrats in which species occurs ÷ total quadrats) × 100; density = individuals ÷ total area sampled.

Line transect and point count are standard methods for animal surveys; repeated observations reduce sampling error.

Noise measurement uses a sound level meter in dB(A), with slow response; readings taken at specified distances and times.

Data quality: calibration of instruments, replicates, blanks and controls, and proper recording of date, time, location and observer; results are presented as mean ± standard deviation.

Monitoring types: ambient (background), source (stack/effluent), and biological monitoring (bioindicators such as lichens for SO2, diatoms for water quality).

Air sampling: high-volume sampler for PM10/PM2.5 on filter paper; gas absorbers for SO2 and NOx; results reported in µg/m³ at standard conditions.

Water sampling: collect in clean containers, preserve samples (acid for metals, cool for BOD), record pH, temperature and DO on site; DO and BOD are measured by Winkler titration and 5-day incubation.

Soil testing: pH by pH meter or indicator, organic carbon by Walkley–Black wet oxidation, and texture by feel or hydrometer method.

Quadrat method for vegetation: random quadrats of 1 m × 1 m (herbs) or 10 m × 10 m (trees); record frequency, density, abundance and basal area.

Frequency (%) = (number of quadrats in which species occurs ÷ total quadrats) × 100; density = individuals ÷ total area sampled.

Line transect and point count are standard methods for animal surveys; repeated observations reduce sampling error.

Noise measurement uses a sound level meter in dB(A), with slow response; readings taken at specified distances and times.

Data quality: calibration of instruments, replicates, blanks and controls, and proper recording of date, time, location and observer; results are presented as mean ± standard deviation.

Monitoring types: ambient (background), source (stack/effluent), and biological monitoring (bioindicators such as lichens for SO2, diatoms for water quality).

Air sampling: high-volume sampler for PM10/PM2.5 on filter paper; gas absorbers for SO2 and NOx; results reported in µg/m³ at standard conditions.

Water sampling: collect in clean containers, preserve samples (acid for metals, cool for BOD), record pH, temperature and DO on site; DO and BOD are measured by Winkler titration and 5-day incubation.

Soil testing: pH by pH meter or indicator, organic carbon by Walkley–Black wet oxidation, and texture by feel or hydrometer method.

Quadrat method for vegetation: random quadrats of 1 m × 1 m (herbs) or 10 m × 10 m (trees); record frequency, density, abundance and basal area.

Frequency (%) = (number of quadrats in which species occurs ÷ total quadrats) × 100; density = individuals ÷ total area sampled.

Line transect and point count are standard methods for animal surveys; repeated observations reduce sampling error.

Noise measurement uses a sound level meter in dB(A), with slow response; readings taken at specified distances and times.

Data quality: calibration of instruments, replicates, blanks and controls, and proper recording of date, time, location and observer; results are presented as mean ± standard deviation.

Monitoring types: ambient (background), source (stack/effluent), and biological monitoring (bioindicators such as lichens for SO2, diatoms for water quality).

Air sampling: high-volume sampler for PM10/PM2.5 on filter paper; gas absorbers for SO2 and NOx; results reported in µg/m³ at standard conditions.

Water sampling: collect in clean containers, preserve samples (acid for metals, cool for BOD), record pH, temperature and DO on site; DO and BOD are measured by Winkler titration and 5-day incubation.

Soil testing: pH by pH meter or indicator, organic carbon by Walkley–Black wet oxidation, and texture by feel or hydrometer method.

Quadrat method for vegetation: random quadrats of 1 m × 1 m (herbs) or 10 m × 10 m (trees); record frequency, density, abundance and basal area.

Frequency (%) = (number of quadrats in which species occurs ÷ total quadrats) × 100; density = individuals ÷ total area sampled.

Line transect and point count are standard methods for animal surveys; repeated observations reduce sampling error.

Noise measurement uses a sound level meter in dB(A), with slow response; readings taken at specified distances and times.

Data quality: calibration of instruments, replicates, blanks and controls, and proper recording of date, time, location and observer; results are presented as mean ± standard deviation.

Monitoring types: ambient (background), source (stack/effluent), and biological monitoring (bioindicators such as lichens for SO2, diatoms for water quality).

Air sampling: high-volume sampler for PM10/PM2.5 on filter paper; gas absorbers for SO2 and NOx; results reported in µg/m³ at standard conditions.

Water sampling: collect in clean containers, preserve samples (acid for metals, cool for BOD), record pH, temperature and DO on site; DO and BOD are measured by Winkler titration and 5-day incubation.

Soil testing: pH by pH meter or indicator, organic carbon by Walkley–Black wet oxidation, and texture by feel or hydrometer method.

Quadrat method for vegetation: random quadrats of 1 m × 1 m (herbs) or 10 m × 10 m (trees); record frequency, density, abundance and basal area.

Frequency (%) = (number of quadrats in which species occurs ÷ total quadrats) × 100; density = individuals ÷ total area sampled.

Line transect and point count are standard methods for animal surveys; repeated observations reduce sampling error.

Noise measurement uses a sound level meter in dB(A), with slow response; readings taken at specified distances and times.

Data quality: calibration of instruments, replicates, blanks and controls, and proper recording of date, time, location and observer; results are presented as mean ± standard deviation.

Monitoring types: ambient (background), source (stack/effluent), and biological monitoring (bioindicators such as lichens for SO2, diatoms for water quality).

Air sampling: high-volume sampler for PM10/PM2.5 on filter paper; gas absorbers for SO2 and NOx; results reported in µg/m³ at standard conditions.

Water sampling: collect in clean containers, preserve samples (acid for metals, cool for BOD), record pH, temperature and DO on site; DO and BOD are measured by Winkler titration and 5-day incubation.

Soil testing: pH by pH meter or indicator, organic carbon by Walkley–Black wet oxidation, and texture by feel or hydrometer method.

Quadrat method for vegetation: random quadrats of 1 m × 1 m (herbs) or 10 m × 10 m (trees); record frequency, density, abundance and basal area.

Frequency (%) = (number of quadrats in which species occurs ÷ total quadrats) × 100; density = individuals ÷ total area sampled.

Line transect and point count are standard methods for animal surveys; repeated observations reduce sampling error.

Noise measurement uses a sound level meter in dB(A), with slow response; readings taken at specified distances and times.

Data quality: calibration of instruments, replicates, blanks and controls, and proper recording of date, time, location and observer; results are presented as mean ± standard deviation.

Monitoring types: ambient (background), source (stack/effluent), and biological monitoring (bioindicators such as lichens for SO2, diatoms for water quality).

Air sampling: high-volume sampler for PM10/PM2.5 on filter paper; gas absorbers for SO2 and NOx; results reported in µg/m³ at standard conditions.

Water sampling: collect in clean containers, preserve samples (acid for metals, cool for BOD), record pH, temperature and DO on site; DO and BOD are measured by Winkler titration and 5-day incubation.

Soil testing: pH by pH meter or indicator, organic carbon by Walkley–Black wet oxidation, and texture by feel or hydrometer method.

Quadrat method for vegetation: random quadrats of 1 m × 1 m (herbs) or 10 m × 10 m (trees); record frequency, density, abundance and basal area.

Frequency (%) = (number of quadrats in which species occurs ÷ total quadrats) × 100; density = individuals ÷ total area sampled.

Line transect and point count are standard methods for animal surveys; repeated observations reduce sampling error.

Noise measurement uses a sound level meter in dB(A), with slow response; readings taken at specified distances and times.

Data quality: calibration of instruments, replicates, blanks and controls, and proper recording of date, time, location and observer; results are presented as mean ± standard deviation.

Monitoring types: ambient (background), source (stack/effluent), and biological monitoring (bioindicators such as lichens for SO2, diatoms for water quality).

Air sampling: high-volume sampler for PM10/PM2.5 on filter paper; gas absorbers for SO2 and NOx; results reported in µg/m³ at standard conditions.

Water sampling: collect in clean containers, preserve samples (acid for metals, cool for BOD), record pH, temperature and DO on site; DO and BOD are measured by Winkler titration and 5-day incubation.

Soil testing: pH by pH meter or indicator, organic carbon by Walkley–Black wet oxidation, and texture by feel or hydrometer method.

Quadrat method for vegetation: random quadrats of 1 m × 1 m (herbs) or 10 m × 10 m (trees); record frequency, density, abundance and basal area.

Frequency (%) = (number of quadrats in which species occurs ÷ total quadrats) × 100; density = individuals ÷ total area sampled.

Line transect and point count are standard methods for animal surveys; repeated observations reduce sampling error.

Noise measurement uses a sound level meter in dB(A), with slow response; readings taken at specified distances and times.

Data quality: calibration of instruments, replicates, blanks and controls, and proper recording of date, time, location and observer; results are presented as mean ± standard deviation.

Monitoring types: ambient (background), source (stack/effluent), and biological monitoring (bioindicators such as lichens for SO2, diatoms for water quality).

Air sampling: high-volume sampler for PM10/PM2.5 on filter paper; gas absorbers for SO2 and NOx; results reported in µg/m³ at standard conditions.

Water sampling: collect in clean containers, preserve samples (acid for metals, cool for BOD), record pH, temperature and DO on site; DO and BOD are measured by Winkler titration and 5-day incubation.

Soil testing: pH by pH meter or indicator, organic carbon by Walkley–Black wet oxidation, and texture by feel or hydrometer method.

Quadrat method for vegetation: random quadrats of 1 m × 1 m (herbs) or 10 m × 10 m (trees); record frequency, density, abundance and basal area.

Frequency (%) = (number of quadrats in which species occurs ÷ total quadrats) × 100; density = individuals ÷ total area sampled.

Line transect and point count are standard methods for animal surveys; repeated observations reduce sampling error.

Noise measurement uses a sound level meter in dB(A), with slow response; readings taken at specified distances and times.

Data quality: calibration of instruments, replicates, blanks and controls, and proper recording of date, time, location and observer; results are presented as mean ± standard deviation.

Monitoring types: ambient (background), source (stack/effluent), and biological monitoring (bioindicators such as lichens for SO2, diatoms for water quality).

Air sampling: high-volume sampler for PM10/PM2.5 on filter paper; gas absorbers for SO2 and NOx; results reported in µg/m³ at standard conditions.

Water sampling: collect in clean containers, preserve samples (acid for metals, cool for BOD), record pH, temperature and DO on site; DO and BOD are measured by Winkler titration and 5-day incubation.

Soil testing: pH by pH meter or indicator, organic carbon by Walkley–Black wet oxidation, and texture by feel or hydrometer method.

Quadrat method for vegetation: random quadrats of 1 m × 1 m (herbs) or 10 m × 10 m (trees); record frequency, density, abundance and basal area.

Frequency (%) = (number of quadrats in which species occurs ÷ total quadrats) × 100; density = individuals ÷ total area sampled.

Line transect and point count are standard methods for animal surveys; repeated observations reduce sampling error.

Noise measurement uses a sound level meter in dB(A), with slow response; readings taken at specified distances and times.

Data quality: calibration of instruments, replicates, blanks and controls, and proper recording of date, time, location and observer; results are presented as mean ± standard deviation.

Monitoring types: ambient (background), source (stack/effluent), and biological monitoring (bioindicators such as lichens for SO2, diatoms for water quality).

Air sampling: high-volume sampler for PM10/PM2.5 on filter paper; gas absorbers for SO2 and NOx; results reported in µg/m³ at standard conditions.

Water sampling: collect in clean containers, preserve samples (acid for metals, cool for BOD), record pH, temperature and DO on site; DO and BOD are measured by Winkler titration and 5-day incubation.

Soil testing: pH by pH meter or indicator, organic carbon by Walkley–Black wet oxidation, and texture by feel or hydrometer method.

Quadrat method for vegetation: random quadrats of 1 m × 1 m (herbs) or 10 m × 10 m (trees); record frequency, density, abundance and basal area.

Frequency (%) = (number of quadrats in which species occurs ÷ total quadrats) × 100; density = individuals ÷ total area sampled.

Line transect and point count are standard methods for animal surveys; repeated observations reduce sampling error.

Noise measurement uses a sound level meter in dB(A), with slow response; readings taken at specified distances and times.

Data quality: calibration of instruments, replicates, blanks and controls, and proper recording of date, time, location and observer; results are presented as mean ± standard deviation.

Monitoring types: ambient (background), source (stack/effluent), and biological monitoring (bioindicators such as lichens for SO2, diatoms for water quality).

Air sampling: high-volume sampler for PM10/PM2.5 on filter paper; gas absorbers for SO2 and NOx; results reported in µg/m³ at standard conditions.

Water sampling: collect in clean containers, preserve samples (acid for metals, cool for BOD), record pH, temperature and DO on site; DO and BOD are measured by Winkler titration and 5-day incubation.

Soil testing: pH by pH meter or indicator, organic carbon by Walkley–Black wet oxidation, and texture by feel or hydrometer method.

Quadrat method for vegetation: random quadrats of 1 m × 1 m (herbs) or 10 m × 10 m (trees); record frequency, density, abundance and basal area.

Frequency (%) = (number of quadrats in which species occurs ÷ total quadrats) × 100; density = individuals ÷ total area sampled.

Line transect and point count are standard methods for animal surveys; repeated observations reduce sampling error.

Noise measurement uses a sound level meter in dB(A), with slow response; readings taken at specified distances and times.

Data quality: calibration of instruments, replicates, blanks and controls, and proper recording of date, time, location and observer; results are presented as mean ± standard deviation.

Monitoring types: ambient (background), source (stack/effluent), and biological monitoring (bioindicators such as lichens for SO2, diatoms for water quality).

Air sampling: high-volume sampler for PM10/PM2.5 on filter paper; gas absorbers for SO2 and NOx; results reported in µg/m³ at standard conditions.

Water sampling: collect in clean containers, preserve samples (acid for metals, cool for BOD), record pH, temperature and DO on site; DO and BOD are measured by Winkler titration and 5-day incubation.

Soil testing: pH by pH meter or indicator, organic carbon by Walkley–Black wet oxidation, and texture by feel or hydrometer method.

Quadrat method for vegetation: random quadrats of 1 m × 1 m (herbs) or 10 m × 10 m (trees); record frequency, density, abundance and basal area.

Frequency (%) = (number of quadrats in which species occurs ÷ total quadrats) × 100; density = individuals ÷ total area sampled.

Line transect and point count are standard methods for animal surveys; repeated observations reduce sampling error.

Noise measurement uses a sound level meter in dB(A), with slow response; readings taken at specified distances and times.

Data quality: calibration of instruments, replicates, blanks and controls, and proper recording of date, time, location and observer; results are presented as mean ± standard deviation.

Monitoring types: ambient (background), source (stack/effluent), and biological monitoring (bioindicators such as lichens for SO2, diatoms for water quality).

Air sampling: high-volume sampler for PM10/PM2.5 on filter paper; gas absorbers for SO2 and NOx; results reported in µg/m³ at standard conditions.

Water sampling: collect in clean containers, preserve samples (acid for metals, cool for BOD), record pH, temperature and DO on site; DO and BOD are measured by Winkler titration and 5-day incubation.

Soil testing: pH by pH meter or indicator, organic carbon by Walkley–Black wet oxidation, and texture by feel or hydrometer method.

Quadrat method for vegetation: random quadrats of 1 m × 1 m (herbs) or 10 m × 10 m (trees); record frequency, density, abundance and basal area.

Frequency (%) = (number of quadrats in which species occurs ÷ total quadrats) × 100; density = individuals ÷ total area sampled.

Line transect and point count are standard methods for animal surveys; repeated observations reduce sampling error.

Noise measurement uses a sound level meter in dB(A), with slow response; readings taken at specified distances and times.

Data quality: calibration of instruments, replicates, blanks and controls, and proper recording of date, time, location and observer; results are presented as mean ± standard deviation.

Monitoring types: ambient (background), source (stack/effluent), and biological monitoring (bioindicators such as lichens for SO2, diatoms for water quality).

Air sampling: high-volume sampler for PM10/PM2.5 on filter paper; gas absorbers for SO2 and NOx; results reported in µg/m³ at standard conditions.

Water sampling: collect in clean containers, preserve samples (acid for metals, cool for BOD), record pH, temperature and DO on site; DO and BOD are measured by Winkler titration and 5-day incubation.

Soil testing: pH by pH meter or indicator, organic carbon by Walkley–Black wet oxidation, and texture by feel or hydrometer method.

Quadrat method for vegetation: random quadrats of 1 m × 1 m (herbs) or 10 m × 10 m (trees); record frequency, density, abundance and basal area.

Frequency (%) = (number of quadrats in which species occurs ÷ total quadrats) × 100; density = individuals ÷ total area sampled.

Line transect and point count are standard methods for animal surveys; repeated observations reduce sampling error.

Noise measurement uses a sound level meter in dB(A), with slow response; readings taken at specified distances and times.

Data quality: calibration of instruments, replicates, blanks and controls, and proper recording of date, time, location and observer; results are presented as mean ± standard deviation.

Monitoring types: ambient (background), source (stack/effluent), and biological monitoring (bioindicators such as lichens for SO2, diatoms for water quality).

Air sampling: high-volume sampler for PM10/PM2.5 on filter paper; gas absorbers for SO2 and NOx; results reported in µg/m³ at standard conditions.

Water sampling: collect in clean containers, preserve samples (acid for metals, cool for BOD), record pH, temperature and DO on site; DO and BOD are measured by Winkler titration and 5-day incubation.

Soil testing: pH by pH meter or indicator, organic carbon by Walkley–Black wet oxidation, and texture by feel or hydrometer method.

Quadrat method for vegetation: random quadrats of 1 m × 1 m (herbs) or 10 m × 10 m (trees); record frequency, density, abundance and basal area.

Frequency (%) = (number of quadrats in which species occurs ÷ total quadrats) × 100; density = individuals ÷ total area sampled.

Line transect and point count are standard methods for animal surveys; repeated observations reduce sampling error.

Noise measurement uses a sound level meter in dB(A), with slow response; readings taken at specified distances and times.

Data quality: calibration of instruments, replicates, blanks and controls, and proper recording of date, time, location and observer; results are presented as mean ± standard deviation.

Monitoring types: ambient (background), source (stack/effluent), and biological monitoring (bioindicators such as lichens for SO2, diatoms for water quality).

Air sampling: high-volume sampler for PM10/PM2.5 on filter paper; gas absorbers for SO2 and NOx; results reported in µg/m³ at standard conditions.

Water sampling: collect in clean containers, preserve samples (acid for metals, cool for BOD), record pH, temperature and DO on site; DO and BOD are measured by Winkler titration and 5-day incubation.

Soil testing: pH by pH meter or indicator, organic carbon by Walkley–Black wet oxidation, and texture by feel or hydrometer method.

Quadrat method for vegetation: random quadrats of 1 m × 1 m (herbs) or 10 m × 10 m (trees); record frequency, density, abundance and basal area.

Frequency (%) = (number of quadrats in which species occurs ÷ total quadrats) × 100; density = individuals ÷ total area sampled.

Line transect and point count are standard methods for animal surveys; repeated observations reduce sampling error.

Noise measurement uses a sound level meter in dB(A), with slow response; readings taken at specified distances and times.

Data quality: calibration of instruments, replicates, blanks and controls, and proper recording of date, time, location and observer; results are presented as mean ± standard deviation.

Monitoring types: ambient (background), source (stack/effluent), and biological monitoring (bioindicators such as lichens for SO2, diatoms for water quality).

Air sampling: high-volume sampler for PM10/PM2.5 on filter paper; gas absorbers for SO2 and NOx; results reported in µg/m³ at standard conditions.

Water sampling: collect in clean containers, preserve samples (acid for metals, cool for BOD), record pH, temperature and DO on site; DO and BOD are measured by Winkler titration and 5-day incubation.

Soil testing: pH by pH meter or indicator, organic carbon by Walkley–Black wet oxidation, and texture by feel or hydrometer method.

Quadrat method for vegetation: random quadrats of 1 m × 1 m (herbs) or 10 m × 10 m (trees); record frequency, density, abundance and basal area.

Frequency (%) = (number of quadrats in which species occurs ÷ total quadrats) × 100; density = individuals ÷ total area sampled.

Line transect and point count are standard methods for animal surveys; repeated observations reduce sampling error.

Noise measurement uses a sound level meter in dB(A), with slow response; readings taken at specified distances and times.

Data quality: calibration of instruments, replicates, blanks and controls, and proper recording of date, time, location and observer; results are presented as mean ± standard deviation.