Study Tracks Pot 'Use' -- Of Kids Under 6

Study Tracks Pot 'Use' -- Of Kids Under 6
A youngster smokes marijuana during a march for the legalization of cannabis in Medellin, Antioquia department, Colombia on May 5, 2012, as part of the 2012 Global Marijuana March which is being held in hundreds of cities worldwide. AFP PHOTO/Raul ARBOLEDA (Photo credit should read RAUL ARBOLEDA/AFP/GettyImages)
A youngster smokes marijuana during a march for the legalization of cannabis in Medellin, Antioquia department, Colombia on May 5, 2012, as part of the 2012 Global Marijuana March which is being held in hundreds of cities worldwide. AFP PHOTO/Raul ARBOLEDA (Photo credit should read RAUL ARBOLEDA/AFP/GettyImages)

A lot of young children are literally going to pot.

A new study suggests that marijuana exposure rate rose 147.5 percent among kids 5 and under -- and it rose nearly 610 percent during that period in the states that legalized medical marijuana before the year 2000.

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