Smoking pot vs. tobacco: What science says about lighting up


NEW YORK — As more states make it legal to smoke marijuana, some officials, researchers and others worry what that might mean for one of the country’s biggest public health successes: curbing cigarette smoking. The juxtaposition strikes some as jarring after generations of Americans have gotten the message that smoking endangers their health. Meanwhile, marijuana advocates say there’s no comparison between joints and cigarettes.

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