What limits should exist on marijuana use?

For the first time in four decades of polling, a majority of Americans support legalizing the use of marijuana.

A Pew poll released Thursday found that 52 percent of those polled said marijuana should be legal. Forty-five percent said it should remain illegal.

Yet, more than half of the respondents said they would feel uncomfortable with people using marijuana around them in public. Today's Question: What limits should exist on marijuana use?

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