The wave toward legalization ignores the serious health risks of marijuana. Mr. Berenson is the author of a forthcoming book on marijuana use. Marijuana seems to be on an unstoppable march to legalization in the United States. New York and New Jersey are racing to join the 10 states that already allow recreational use of cannabis. Some 65 percent of Americans favor legalization, and several potential Democratic candidates for president support ending federal prohibitions on marijuana. This huge shift in public attitudes comes even though most Americans do not use the drug. What Advocates of Legalizing Pot Don’t Want You to Know

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