A legal battle is unfolding in Pennsylvania that could have major implications for slashing heat-trapping pollution from the Northeast's electricity system. The fight is also a test case for using market-based approaches to tackle climate change. It's centered on the Regional Greenhouse Gas Initiative — the nation's only multistate carbon-trading program, which requires power plants to buy an increasingly limited number of pollution permits. Pennsylvania's participation is key to making the scheme more effective. That's because the state supplies the region with a huge chunk of its electricity, produced largely from fossil fuels. Cleaning up Pennsylvania's power could clean up the region overall. The fate of Pennsylvania's membership now rests with the state's high court after a group of labor unions, energy companies and Republican state senators challenged Democratic Gov. Tom Wolf's decision to join the program through an executive order. Regardless of the court's decision, the results of the upcoming gubernatorial race could still doom the effort. Wolf is term limited and both Democratic and Republican candidates have expressed reservations. Is cap and trade effective? It can be. But it highly depends on the program. For RGGI, pronounced Reggie, the program has meaningfully decreased coal and natural gas consumption in participating states and cut planet-warming emissions by 1.3 million tons per year. It has also generated billions of dollars in revenue. In a global context, 68 countries have some sort of cap-and-trade scheme, and many are modeled after RGGI. While most are modest in scope, some — like in Europe and Canada — are not, says Barry Rabe, a professor who studies state climate action at the University of Michigan. "As the cap gets tighter, those emission reductions do appear deeper," he said. Only game in town California operates a cap-and-trade program with Quebec, Canada. And Washington state and Oregon recently enacted their own statewide schemes. But RGGI is by far the nation's largest and longest operating multistate system, which matters in a country that has failed to enact sweeping federal climate policies. "In the absence of a comprehensive federal climate policy, [these programs] are pretty much the only game in town," said Maya Domeshek, a senior research analyst at Resources for the Future.
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