WBCHSE HS ENVS study plan

Define the seven major pollution types (air, water, soil, noise, thermal, radioactive, solid waste) and classify ten given scenarios by type and primary pollutant

Distinguish point-source from non-point-source pollution and identify which control strategy (prevention, dilution, treatment, legislation) applies to each of eight examples

Explain the formation and health effects of the six criteria air pollutants, including the photochemical smog and acid-rain reaction chains, in written notes

Compute simple pollutant concentration and dilution problems (ppm, mg/L, percentage removal) from supplied numbers without a calculator error

Describe primary, secondary and tertiary wastewater treatment in sequence and state the purpose of each unit operation

Compare the 3R hierarchy (reduce, reuse, recycle) with waste-to-energy and sanitary landfill options for five Indian waste streams

Outline the key provisions of Indian pollution-control law (Water Act 1974, Air Act 1981, Environment Protection Act 1986) and match each to the pollution type it governs

Sketch a labelled flow diagram of a municipal solid waste management chain from collection to final disposal

Define ecosystem, habitat, niche, food chain, food web and trophic level, and build a food web for a named local ecosystem

Explain energy flow, the 10% law and ecological pyramids, and calculate energy loss across four trophic levels from given figures

Describe the major biogeochemical cycles (carbon, nitrogen, phosphorus) and identify the human activity that most disturbs each

Classify biodiversity at genetic, species and ecosystem levels and list the four major threats with one Indian example each

Explain population growth models (exponential and logistic), carrying capacity and age-structure pyramids with labelled sketches

Describe species interactions (competition, predation, parasitism, mutualism, commensalism) and assign each to a named example

Outline in-situ and ex-situ conservation measures and the role of biosphere reserves, national parks and sanctuaries

List the schedules of the Wildlife (Protection) Act 1972 and state what each schedule protects

Classify natural resources as renewable and non-renewable and give three Indian examples of each with their use pattern

Explain soil erosion, desertification and salinisation, and describe three conservation measures for each

Describe rainwater harvesting, watershed management and check dams, and outline how each improves groundwater recharge

Summarise the status of Indian forest cover, energy sources and the debate over large versus small dams

Explain the greenhouse effect and distinguish it from global warming and climate change

List the major greenhouse gases with their relative contributions and sources, and rank them by global warming potential

Describe the mechanism of stratospheric ozone depletion, the role of CFCs and the significance of the Montreal Protocol

Outline the key outcomes of the UNFCCC, Kyoto Protocol and Paris Agreement and explain the difference between mitigation and adaptation

Explain the Brundtland definition of sustainable development and apply the three pillars to evaluate two development projects

List the 17 Sustainable Development Goals and match at least eight to specific environmental issues studied earlier

Describe major disaster types in West Bengal (cyclones, floods, landslides) and the phases of the disaster management cycle

Explain environmental health hazards, biomagnification and the routes of exposure to toxic substances

Describe field techniques for measuring air, water and soil quality, including pH, dissolved oxygen, turbidity and simple sampling protocols

Interpret given data tables and graphs to draw valid environmental conclusions

Revise all nine domains using a spaced-repetition checklist and close every flagged weak topic

Attempt two full-length mock papers under timed conditions and analyse errors by domain