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When someone smokes over time, the inhaled combusted tobacco and paper damage the tiny air sacs in the lungs called alveoli, which facilitate the exchange of oxygen and carbon dioxide

American Cancer Society: Health Risks of Smoking Tobacco American Cancer Society webpage with information about the health impacts of smoking tobacco

Blast your head with cool air If you find yourself with a head full of bad-smelling hair and are within reach of your trusty hair dryer, a quick blast of cool air may do the trick to eliminate odors

It reaches the brain within seconds and binds to nicotinic acetylcholine receptors, activating circuits that light up dopamine release in the nucleus accumbens: the brain's reward hub tied to learning and attention