In contrast, the use of marijuana in the United states has been illegal for quite some time. It got banned after the end of prohibition, basically because the head of the Department of Prohibition needed to find something else to target after alcohol was deemed legal again.
According to the CDC, “Tobacco use remains the single largest preventable cause of death and disease in the United States. Cigarette smoking kills more than 480,000 Americans each year, with more than 41,000 of these deaths from exposure to second hand smoke.”
The CDC also said that, “smoking-related illness in the United States costs more than $300 billion a year.” That number includes $170 billion in medical expenses, and over $150 billion in lost worker productivity. Cigarettes aren't just bad for your health — they're also bad for the economy.