Write 'true' or 'false' for the following:

(a) Air is a compound. ……………

(b) Carbon dioxide is given out during photosynthesis. ……………

(c) Respiration needs nitrogen. ……………

(d) The composition of air was discovered by Lavoisier. ……………

(e) The major component of air is oxygen. ……………

Match the following

Name two air pollutants which

(a) affect our health,

(b) cause acid rain,

(c) cause global warming.

Name three greenhouse gases.