carbon monoxide cigarette smoke in harms health Mayo Clinic Q and A:

Contrary to popular social belief, it is NOT illegal to smoke tobacco products at any age

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The fact that the tobacco industry makes a product which, when used as directed, kills people and they have a history of lying and fraud, which dates many decades means they cannot be trusted and cannot be part of the solution. References 1 R Polosa & N L Benowitz, Trends Pharmacol

A big racial divide on living with your parents : Thirty-six percent of adults say young adults living with their parents is a bad thing for society

Cigarette butts are made of plastic (cellulose acetate) that can take up 10 years to degrade, and when it does, it turns into microplastics that pollute our environment