DENVER (AP) -- The anticipated campaign to legalize marijuana in Colorado is about to begin.
Backers of a suggested ballot measure to make pot legal for adults in small quantities say they'll start gathering signatures Thursday afternoon in Denver. The backers were waiting for final clearance Wednesday from a state board that certifies language before it can be placed on ballots.
Colorado has one of the nation's lowest thresholds for putting items on a ballot. Pot backers need about 86,000 valid signatures to go to voters.
Colorado voters rejected a pot legalization question in 2006.
Advocates say they hope the growth of medical marijuana in the state has changed attitudes about the drug.
No state allows pot for recreational use. California voters rejected a measure in that state last year.
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