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Garth Heutel

FILE - In this file photo taken July 16, 2014, Christian Oggenfuss stands near solar panels on top of the living roof at the Odette Estate winery in Napa, Calif. A new estimate from the U.S. government shows that California met about half of the state's electricity demand for three hours on March 11, 2017--the state's goal is for 50 percent of all electricity to come from renewable sources by 2030. (AP Photo/Eric Risberg, File) (AP)

California’s new solar rooftop mandate could be better

Garth Heutel
(AP Photo/Andy Wong, File)

Climate change and weather extremes: Both heat and cold can kill

Garth Heutel, David Molitor, Nolan Miller