Researchers identify main factors of home indoor air pollution: marijuana surprisingly plays a big role

Families that reported smoking cigarettes indoors had an average particle level almost double that of non-indoor-smoking families. These particles included nicotine and combustion byproducts, both linked to health issues. Surprisingly enough, marijuana smoking contributed to in-home air pollution about as much as tobacco smoking. Burning candles or incense, frying food in oil, and spraying cleaning products also led to an increase in the number of fine particles.

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