A letter signed by 77 local boards of health asks Gov. Charlie Baker to suspend new gas projects until after a review.
Critics of the proposed 145-mile power line say it won’t reduce global greenhouse gas emissions despite company’s claims.
The state awarded $20 million in grants with hopes of helping to increase state’s storage capacity by more than tenfold.
A letter to the governor and the region’s top transit official last month calls for purchasing electric vehicles only by 2030.
The Massachusetts Supreme Judicial Court unanimously affirmed the state’s authority to regulate greenhouse gas emissions from power plants.