Vaporizers have come into popular use as an alternative to smoking marijuana. Vaporizers work by heating plant materials in a partial vacuum, which releases the active ingredients without combustion or smoke. This method is said to significantly reduce, if not eliminate, carcinogens such as carbon monoxide and tar. Use of a vaporizer also eliminates the possibility of second-hand smoke, unwanted odors and is more efficient as it requires less of the drug for similar effects.
Vaporizers can be purchased in the United States for as little as $100, but more complex systems can sell for $800 or more.
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http://www.cnbc.com/id/36138213
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