2.
What is Carcinogen?

3.
The Term Smog was introduced in 1905 by

4.
The gas that absorbs most of the harmful ultraviolet radiation in the stratosphere:

5.
Atmospheric ozone layer which protect us from UV-B and C is getting depleted most by addition of

6.
Which of the following green house gases trap more heat?

7.
The most abundant gas in the stratosphere is:

8.
Acid rain mainly result from

9.
Animals that feed only on plants are called

10.
The first trophic level in a food chain