The nine states of the Regional Greenhouse Gas Initiative, including New Hampshire, have set a new, more ambitious goal for reducing carbon emissions by 2030.
They want to cut pollution by 30 percent -- or more, if that proves too easy.
The states in RGGI agreed this month on that new goal and other updates to the eight-year-old program. It lets polluters either reduce emissions, or buy credits to keep emitting. The proceeds from those credits go to rebates and efficiency projects.