On Monday, Gov. Jerry Brown, who is one of the sponsors of the Global Climate Action Summit, signed a bill requiring California’s utilities to get all their electricity from zero-carbon sources by 2045.
And former Vice President Al Gore struck a bullish note on the spread of zero-carbon technologies at an event on Tuesday. But he was also blunt about the pace of change. “We’re still not winning,” he said. “We have to make the decarbonization of the global economy the central organizing principle of human civilization.”