“Emissions-reduction must hit 40 percent by 2030 and twice that by 2050. In 12 years, half the state’s energy must come from renewable sources such as wind and sun. California’s 14 million buildings must operate twice as efficiently, and the number of electric cars on the road will have to multiply more than 10 times. Failure would likely mean more extreme measures in later years and, many experts say, could affect public health.”
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