Which is considered to be the most widely used illicit substance worldwide?

Question

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Cannabis is considered to be the most widely used illicit substance worldwide. According to the United Nations Office on Drugs and Crime, an estimated 192 million people used cannabis in 2018. While alcohol is a commonly used substance, it is legal in most countries and therefore not considered illicit. Methamphetamine and steroids are also commonly used, but their use is more limited compared to cannabis.

Which Is Considered to Be the Most Widely Used Illicit