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It is also clear that not everyone believes that cannabis should be legalized for recreational use. Many people still firmly believe that cannabis is a dangerous drug, and are opposed to recreational adult use. They cite an increase in traffic accidents in states that allow recreational cannabis use, the negative effects of cannabis on youth (although recreational users must be at least twenty-one), an increase in crime and threatening of moral values, and a rise in hospitalizations and marijuana-related poisonings. Despite the continuing controversy, eight states in the United States have legalized recreational cannabis for adult use: Alaska, California, Colorado, Maine,

Attitudes about the use of cannabis are changing around the world.

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