By Ray Stern | Phoenix New Times
The nation has seen six years of legal medical or recreational marijuana use in 23 states and Washington, D.C., not to mention decades of widespread illegal use, but experts still have no real idea whether the drug poses any significant danger.
What is certain is that marijuana is the second most popular spirituous substance behind liquor in the United States.
Since the Obama era began, more people have smoked, vaped, eaten, and drunk marijuana than ever, according to the Office of National Drug Control Policy. Based on a 2011 survey, an estimated 18.1 million people over age 12 reported consuming marijuana in the past month, and about 5 million consumed it almost daily — and that was four years ago.
