As Pot Goes Mainstream, Dark Side of Legalization Emerges

Marijuana smoke rises from a smoking crowd April 20, 2010 at a pro-pot "4/20" celebration in front of the state capitol building in Denver, Col. John Moore/Getty Images

News Analysis

As marijuana, as promoted by the mainstream media, entertainment industry, and tax-hungry governments, becomes increasingly mainstream in modern America, evidence is emerging that this drug that so many have deemed harmless may actually have detrimental effects on humans, especially young people.