Environmental Issues Free CBSE NCERT solution for class 12th biology

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Q1	What are the various constituents of domestic sewage? Discuss the effects of sewage discharge on a river.
Q2	List all the wastes that you generate, at home, school or during your Trips to other places, could you very easily reduce? Which would be Difficult or rather impossible to reduce?
Q3	Discuss the causes and effects of global warming. What measures need to be taken to control global warming?
Q4	Column A Column B (a) Catalytic converter (i) Particulate matter (b) Electrostatic precipitator (ii) Carbon monoxide and nitrogen oxides (c) Earmuffs (iii) High noise level (d) Landfills (iv) Solid wastes
Q5	Write critical notes on the following: (a) Eutrophication (b) Biological magnification (c) Groundwater depletion and ways for its replenishment
Q6	Why ozone hole forms over Antarctica? How will enhanced ultraviolet Radiations affect us?
Q7	Discuss the role of women and communities in protection and conservation of forests.
Q8	What measures, as an individual, you would take to reduce environmental pollution?
Q9	Discuss briefly the following: (a) Radioactive wastes (b) Defunct ships and e-wastes (c) Municipal solid wastes
Q10	What initiatives were taken for reducing vehicular air pollution in Delhi? Has air quality improved in Delhi?
Q11	Discuss briefly the following: (a) Greenhouse gases (b) Catalytic converter (c) Ultraviolet B