Acadia Center, an environmental and renewable energy advocacy group, has been part of RGGI’s development since its inception. Its assessment, based in part on work by the Duke Nicholas Institute, found 2017 emissions were 51% below levels in 2008, at the beginning of RGGI auctions, Stutt told Utility Dive.

That includes an 18% year-on-year drop from 2016 to 2017, the biggest drop-off in emissions since the region’s use of coal leveled off, Stutt added. The newest cuts in emissions come from the accumulating potency of the energy efficiency and clean technology investments made with auction proceeds.

The RGGI states have also seen significant cumulative economic benefits, according to the Analysis Group’s review of RGGI’s 2015 to 2017 compliance period, released April 17.

Read the full article from Utility Dive here.