California and Washington state join carbon pledge in defiance of Trump

Reuters:  California and Washington state joined five nations on the Pacific coast of the Americas on Tuesday to agree to step up the use of a price on carbon dioxide emissions as a central economic policy to slow climate change.

The U.S. states were acting in defiance of President Donald Trump who says he doubts that man-made greenhouse gas emissions from burning fossil fuels are the prime cause of global warming and plans to quit the 2015 Paris climate accord.

Canada, Mexico, Costa Rica, Colombia and Chile agreed the measure at a climate summit in Paris along with the two U.S. states and provinces across Canada of British Columbia, Alberta, Ontario, Quebec and Nova Scotia.

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