article_snippet.sent: Marijuana is legal to buy and consume recreationally in Colorado - but only for people over age 21.
article_snippet.sent: Buying marijuana for a teenager offers similar penalties to providing alcohol for minors in other states.
article_snippet.sent: Critics contend that the levels of the hallucinogen in Colorado marijuana is extremely high - often too high for people who are not regular users to tolerate.
article_snippet.sent: retail sales of the drug began there last year.