Q.

If UNEP had not passed any regulation to control the CFC levels, then what could have been the possible consequences after a few years

1 Increase in CFC levels and thus increase in global warming.  
2 Major amount of UV radiations reaching the earth, therefore, multifold increase in problems like cancer.  
3 Increase in natural calamities like Tsunamis and cyclones.  
4 Lowering of the temperature of the earth.  

Ans.

(2)

If UNEP has not controlled the CFC levels, then after 20 years there would have been major destruction of the ozone layer due to an increase in CFC levels in the environment.