i smell cigarette smoke where there is none from neighbors Downstairs Neighbor Keeps Smoking Outside And Makes His Apartment Smell, So why do i smell cigarette

1.2 Tobacco consumption and social influence Tobacco consumption is the leading preventable risk factor for chronic disease and mortality worldwide, responsible for over seven million annual deaths from direct consumption and 1.2 million from second-hand smoke (World Health Organization, 2025)

Because its 50 times more potent than heroin, even a small dose can be fatal

Adeyinka Charles Adejumo et al

Despite the importance of numerous psychosocial factors, at its core, drug addiction involves a biological process: the ability of repeated exposure to a drug of abuse to induce changes in a vulnerable brain that drive the compulsive seeking and taking of drugs, and loss of control over drug use, that define a state of addiction