If you could pass legislation that would reduce greenhouse gas emissions, return money to Massachusetts residents and businesses, increase the number of jobs in the state, and accelerate the growth of the commonwealth’s clean energy sector, why wouldn’t you? Massachusetts has the opportunity to be a national leader on one of the most urgent issues of our time — climate change — just as we were with universal health care and marriage equality. We can do that by becoming the first state in the nation to pass carbon fee and refund legislation, a market-driven system that will benefit both the environment and the economy.