question_answer

Given pie-diagram represents the relative contribution of various greenhouse gases (P, Q, R and S) to total global warming. Select the correct option regarding it. 

A)  Increase in 'Q' concentration increases the rate of   photosynthesis. 

B)  'R' are used in aerosols cans, jet fuel and as refrigerants in air conditioners.

C)  'S' is produced by combustion of nitrogen rich fuels, livestock wastes and breakdown of nitrogen fertilisers in soil.

D)  'P' is a potent secondary pollutant.