A new study says the drought in California has forced an increased use of natural gas to produce electricity, as dwindling river flows have reduced hydropower generation. Ed Joyce reports from Sacramento.
The Pacific Institute says less hydroelectricity means more expensive electricity.
Peter Gleick: "We get a lot of electricity normally from hydropower, which is relatively inexpensive and relatively clean. And during a drought we don't have the water and we don't get the power."