The plan is politically unpopular – past attempts prove

As my colleagues , experts generally agree that there are two ways of reducing greenhouse gas emissions at the speed and scale required. The first is making fossil fuels more expensive by ensuring that their environmental costs — global warming, for one, but also the staggering harms of  — are reflected in their price. While widely championed by , carbon taxes have proved politically unpopular: A carbon tax by ballot referendum in Washington State has failed .