Nationwide, marijuana use is rising and the use of methamphetamines and cocaine is declining, according to a survey by the Substance Abuse and Mental Health Services Administration (SAMHSA) and reported by Reuters. About 17.4 million Americans said they used marijuana in 2010, which is up from 14.4 million people in 2007. An increase in pot smoking is especially prominent in states that allow medical marijuana. Current meth and cocaine use fell by about half between 2006 and 2010.

To read the Reuters article, click here.