Question

what is the difference between pure air and polluted air

Answer 1

here is your answer
inferior there is a little amount of co2
but in polluted air there is a too much amount of co2

Answer 2

pure air is free from germs and harmful gases.It contains 78% nitrogen,21 % oxygen and small amount of other gases while polluted air contains harmful gases and unwanted substances which is not good for our health.