The problem of ozone depletion is caused by high levels of chlorine and bromine compounds in the ___ .

Q. Consider the following statements:

Which of the above statements is/are correct?

1. 
   1 and 2 only
2. 
   2 only
3. 
   2 and 3 only
4. 
   1 and 3 only

Tick the correct answer.

(i) Which of the following gases protects us from harmful sun rays?

(ii) The most important layer of the atmosphere is

(iii) Which of the following layers of the atmosphere is free from clouds?

(iv) As we go up the layers of the atmosphere, the pressure

(v) When precipitation comes down to the Earth in the liquid form, it is called

The major cause for depletion of ozone layer in stratosphere is due to the