People have to breath to live. Air pollution can make that a problem.
A new study from the University of British Colombia found that more than 5.5 million people will die prematurely each year because of air pollution. More than half the deaths will occur in China and India, two of the fastest growing economies.
Air pollution is a mixture of fine particles, gases, ozone, tobacco smoke and other substances, according to the National Institute of Environmental Health Sciences. Heart disease, asthma and other lung diseases have been linked to air pollution.Air pollution is caused by many sources.Power plants and industrial manufacturing account for some air pollution. Vehicle exhaust is a major contributor. Burning coal and wood for heat also make air pollution worse.

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