Are marijuana growers sucking California dry?

Aired: 6/9/2015 | 0:08:52 | Clip
Thousands of marijuana farms are depleting California's streams at the height of a historic drought, according to state scientists. Special correspondent Spencer Michels follows along as game wardens, biologists and engineers go in search of marijuana on privately-owned lands -- not to eradicate the plants, but to see if growers are stealing and polluting water.