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US national parks have just as much air pollution as major cities
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doi: https://doi.org/10.1038/d41586-018-05756-z
References
Keiser, D., Lade, G. & Rudik, I. Sci. Adv. 4, eaat1613 (2018).
Sharp, N. C. C. & Carlisle, A. J. Br. J. Sports Med. 35, 214-222 (2001).