CHAPTER 5 OUTPUT TESTNAME: DATE:State 5 steps to control air pollution.i.ii.iii.iv.v.How cigarette smoke can be harmful to the lung?i.ii.iii.Pollution from combustion causes.i.ii.

CHAPTER 5 OUTPUT TESTNAME: DATE:State 5 steps to control air pollution.i.ii.iii.iv.v.How cigarette smoke can be harmful to the lung?i.ii.iii.Pollution from combustion causes.i.ii.