According to a recent analysis by the Acadia Center, carbon dioxide emissions from the RGGI states have fallen more than 40 percent compared to 2008 levels. In 2016, their annual CO2 emissions fell to just under 80 million tons.
One of those would lower the post-2020 cap by the amount of excess allowances banked in the years leading to 2020, which the Acadia Center has estimated could prevent nearly 50 million tons of carbon pollution. The other would automatically lower the cap, by up to 10 percent a year, if allowances fall below expected levels.
Read the full article from InsideClimate News here.