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California may be a leader on climate change, but it still has plenty of work to do

Grist: When Gov. Jerry Brown arrives in Paris next week for a major international conference on climate change, he will showcase one of the world’s most sweeping programs to cut greenhouse gas emissions. California has perhaps the most comprehensive cap-and-trade program in the world, setting a limit and a price for pollution from factories, utilities, and transportation fuels. The state’s 2030 goals of getting half of its electricity from renewable sources and reducing greenhouse gas emissions to 40...