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doi: 10.1021/acs.est.8b01533 Summary Keywords CBs pollution, social behavior, microplastic pollution, ecological impacts, social burden, environmental perspective Citation Yang S, Gu C and Yang Q (2023) The unignorable ecological impact of cigarette butts in the ocean: an underestimated and under-researched concern

But being around marijuana smoke for a long time in a small, closed space (like hours after using it) can cause THC levels to be measurable, especially on saliva tests

The Tobacco Kingdom: Plantation, Market and Factory in Virginia and North Carolina (Duke University Press, 1938)

Nature 431 , 525526 (2004)