Pollution of air

At the end of this activity, students should be able to:
– describe the composition of air and the structure of the atmosphere
– explain how the contemporary atmosphere evolved
– explain the carbon cycle and discuss how it is disturbed by human activities
– explain why the increasing concentration of atmospheric CO2 contributes to global warming, and what the probable results of a prolonged greenhouse effect would be
– indicate the sources of sulphur dioxide and nitrogen oxides
– explain the phenomenon of acid rain
– describe the formation of photochemical smog
– explain how CFCs disrupt the ozone layer.