What is the full form of BHC?
Which other compound except CFC are responsible for ozone layer depletion.
What source of pollution is the vapor emitted from the plants?
Which of the following is the cause of decreased visibility and lack of sunlight on the earth's surface.
Which term is used to describe any undesirable changes in the fresh water.
What percentage of land of Nepal is covered by snow throughout the year and river and pond?
How can we conserve water? Write in points.
Why should we conserve water?
What are the six measures that should be adopted for the conservation and management of forests?
What are the advantages of forest?
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