The air we're breathing is causing cancer. The International Agency for Research on Cancer (IARC), a part of the World Health Organization (WHO), has now classed air pollution in the same category as tobacco smoke, UV radiation and plutonium. PM 2.5 relates to fine particles, which contain large amounts of toxic and hazardous substances that stick in your lungs. Causes include cooking emissions, oil soot, and industrial processes, as well as second-hand smoke.
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