WBCHSE HS ENVS case studies
WBCHSE HS ENVS · Put your knowledge to work in context.
Environmental Science at the WBCHSE Higher Secondary level is a Class XI–XII elective for students in West Bengal who want a science-flavoured subject that sits between biology, chemistry, geography and civics. It suits candidates who intend to move into environmental science, forestry, wildlife, public health, civil services or engineering, and also those who simply want a scientifically grounded understanding of pollution, resources and climate. The WBCHSE HS ENVS case studies are 5 cases and about 3,609 words.
1Falling water table in a tube-well block: recharge ponds or more free power?
Kansabati block has 14,200 ha of cultivated land. Between 2006 and 2024, energised tube wells rose from 210 to 1,120, and boro paddy area rose from 900 ha to 3,600 ha.
823 words, about 4 min2A bypass road through a bird-rich oxbow wetland
A 42-hectare oxbow wetland near a district town supports 18,400 waterbirds in the January census, representing 63 species, including 2,100 lesser whistling ducks and 46 black-headed ibis. The state has proposed notifying it as a conservation reserve.
716 words, about 4 min3LPG connections but chulha smoke: why the kitchen remains polluted
In a Sundarban fringe village of 640 households, 88% have an LPG connection, but the average refill is only 1.2 cylinders a year. About 72% of households still cook on a mud chulha for part of the day.
660 words, about 3 min4Sixty-two tonnes a day and no landfill: choosing a waste system
A municipal ward generates 62 tonnes per day of mixed municipal solid waste. Composition by wet weight is 54% biodegradable, 12% recyclable, 8% inert and 26% other.
714 words, about 4 min5Cyclone shelters, embankments and shrimp ponds: ranking adaptation under a budget
A coastal block with 18,000 people has faced nine cyclones in 20 years. A 2.5 km earthen embankment protects 1,200 ha of paddy, but it breached twice, and soil salinity in the protected area has risen to 4 dS/m.
696 words, about 3 min