Air pollution is a serious global health problem.In some cities,it causes a large number of deaths.The world Health Organization says that air pollution kills around three million people each year,approximately the same as malaria and AIDS. Most of the pollution comes from sulfur dioxide,nitrogen oxide,carbon monoxide,tiny particles of solid and liquid matter, and lead emissions from gasoline exhausts.we must look into the matter and try our best to save this planet from pollution.Government should also take further steps to prevent air pollution.
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