Claim: "The 2012 National Survey on Drug Use and Health found that up to half of daily marijuana smokers become addicted -- an estimated 2.7 million people in the U.S."
Fact-check: Author says half of daily users  become addicted, roughly 2.7 million people
Verdict: true
Organisation: PolitiFact
Author: Katie Mulvaney
Date published: 2015-02-09T00:00:00