The legalization of marijuana could dry up a revenue stream for police, according to reports. Here, two men share a water pipe underneath the Space Needle shortly after a law legalizing the recreational use of marijuana took effect in Seattle in 2012.
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This dead juvenile coho salmon was found in a tributary of California's South Fork Eel River. About 20 large-scale marijuana farms are located upstream from the watershed pictured. All of them divert water from the stream.
Courtesy Scott Bauer
A man uses the Nasal Ranger to detect smells in the southern U.S., in this photo provided by St. Croix Sensory. In Denver, the device is being used to monitor complaints of strong marijuana smells.
Courtesy of Nasal Ranger
An aerial image shows the Gold Star cargo ship ablaze. Officials say the ship's crew set fire to 30 tons of hashish after authorities approached the vessel for inspection.
Guardia di Finanza
Sen. Patrick Leahy is calling on the Justice Department to state its position on marijuana's legal status. Here, a man inspects a shirt depicting the U.S. flag made of marijuana symbols, at a medical marijuana show in Los Angeles earlier this year.
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A photograph taken on May 20, 2013, by the DEA Strike Force shows some of the marijuana plants the agency says were grown by a woman from a wealthy New York suburb, in a warehouse in the Queens borough of New York.