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E-cigarettes are generally considered to be less dangerous for human health than combustible cigarettes, and are a promising harm reduction tool for smokers. However, despite possible health benefits compared with tobacco smoking, vaping is a potential environmental threat. Recently, dry powder inhalers—widespread medical devices routinely used to treat pulmonary diseases—were shown to have a concerning carbon footprint. Given their similarities to inhalers, the impact of e-cigarettes on planetary health can also no longer be ignored.