1.
More solar radiation is received at the:

2.
In the northern hemisphere, a solar panel should be placed on the side of the roof facing:

6.
Man made sources of radiation pollution are:

7.
Renewable energy resources are mostly based on

8.
__________ was developed after World War II.

9.
The term "Nuclear winter" is associated with

10.
Which of the following group of gases cause photochemical smog?