PLZ help me 翻譯 these!thx thx thx!!!!!!
Air Pollution
The main causes of air pollution are power plants ,factories and heavy traffic.Power plants make electricity .There are three power plants in Hong Kong .they produce a lot of smoke and make the air dirty .
Factories,buses,minibus,taxis and cars also give out smoke and make the air dirty.
Air pollution is serious problem.Therefore,the government ought to make everyone keep the air clean .