1) air pollution a) the contamination of air due to the presence of substances in the atmosphere that are harmful to the b) the contamination of water sources by substances which make the water unusable for drinking, cooking, cleaning, swimming, and other activities. 2)  reasons for air polution a) fuel combustion b) Waste c) Factory smoke d) all 3) How do we reduce air pollution a) Keep your car in good repair. b) Don't burn your garbage c) Use less energy d) Plant and care for trees. ... e) all

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