1. The clearing of forests is referred to as

2. Deforestation leads to

3. Which of the following gases is needed by plants for photosynthesis?

4. Name the process undertaken by plants for preparing their own food.

5. An increase in the amount of carbon dioxide results in

6. The reduction in rainfall could cause

7. The removal of top layer of soil leads to

8. Name the sphere that supports life, and where living organisms exist.

9. The variety of organisms living on the earth, is referred to as

10. Name a biosphere reserve where the plants and animals are similar to those of the upper Himalayan ranges and lower western ghats.