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or years, lawmakers in Olympia have considered whether Washington should implement its own cap-and-trade program on carbon emissions or require transportation fuels to be less polluting. This session, they decided the state should do both. The two major policies, the Clean Fuel Standard and a program putting a cap on greenhouse gas emissions and requiring clean energy investments called the Climate Commitment Act, will act in concert with one another. They ll reduce greenhouse gas emissions, reduce air pollution, and require investments in cleaner buildings, electric vehicle infrastructure, and more. Both bills need to be signed by Gov. Jay Inslee to become law. In the meantime, here are answers to some of the common questions about each.