Researchers track pot 'use'--of kids under 6

Researchers found that more kids are being exposed to marijuana—by the age of 5, they report in Clinical Pediatrics. Between 2006 and 2013, the marijuana exposure rate rose 147.5 percent among kids 5 and under, according to a press release—and it rose nearly 610 percent during that period in states that legalized medical marijuana before the year 2000 (by our count, five).