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E-cigarette users show cancer-linked genetic changes E-cigarettes may not be risk-free: A USC study shows users develop some of the same molecular changes as cigarette smokers

Even worse, smoke can include a mix of harmful chemicals depending on what was burning: Wood (from fires or fireplaces) Plastic and synthetics (from house fires) Tobacco and nicotine (cigarettes) Grease and protein fires (kitchen fires) Each type leaves behind its own unique chemical footprint, making smoke smell removal a complex process

This prevents smoke accumulation that reduces visibility and leaves lingering odors

Mr O'Brien also ruled out raising the minimum age for the sale of cigarettes from 18