According to a recent report by the World Health Organization, 1 in 8 people die from air pollution. Air pollution has also been linked to heart disease, strokes, and cancer. As a result, the organization declared, "Air pollution is the single greatest environmental health risk in the world today."
Common pollution sources include smoke, pet dander, dust, and mold. Pollution levels vary from region to region, but they continue to pose a serious environmental risk.
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