1.
The Earth summit was organised by

2.
World Environmental day is celebrated on ________ every year.

3.
Environment includes

4.
The largest ecosystem of earth is

5.
For which of the following reason, it is necessary to secure a large area for forest?

6.
Among the following climatic factors, which one has the least effect upon a terrestrial ecosystem?

7.
Soil is eroded heavily due to deforestation, it affects the flowing of surface water badly. Which of the following is badly affected by these causes

8.
What is the ecological system integrating all living beings and their relationships?

9.
Global warming is expected to result in

10.
What is the cause of 'Green house effect'?