How much do you know about marijuana?
By early 2014, some 20 US states and the District of Columbia had legalized the use of marijuana for medical purposes. In Nov. 2012, voters in Washington and Colorado passed initiatives to make their states the first in the country to allow recreational use of the drug. But under federal law, the sale of cannabis remains illegal. And the US Food and Drug Administration states that marijuana has "no currently accepted medical use in treatment in the United States." How much do you know about marijuana? Take our quiz and find out:
1. Today, marijuana grows all over the world, but where is the cannabis plant found indigenously?
Central and South Asia