Opinion: An all-renewable energy grid ‘definitely feasible’ for California. But at what cost?
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“Borenstein said the biggest obstacle to hitting 100 percent will be storage. Natural gas-fired plants, which account for 33 percent of the state’s electricity, can be ramped up and down as demand fluctuates. But wind power can only be generated when it’s windy; solar power only works when it’s sunny. They can’t be stored up,…