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♤ Air pollution is aggravated because of four developments: increasing traffic, growing cities, rapid economic development, and industrialization.
♤ ‘The presence in the atmosphere of one or more contaminants in such quality and for such duration as it is injurious, or tends to be injurious, to human health or welfare, animal or plant life.’
♤ It is the contamination of air by the discharge of harmful substances.
♤ Air pollution can cause health problems, damage the environment, property and climate change.