Hundreds of environmental groups on Tuesday submitted a petition calling on the Environmental Protection Agency to take action to curtail ethane and methane emissions responsible for smog.
A letter to the head of the National Oceanic and Atmospheric Administration comes after a Portland Press Herald report on record-warm water flowing into the gulf's main entrance.
In a letter Monday to Interior Secretary Ryan Zinke, Maine's senators say the risks of environmental and economic damage outweigh any potential benefits.
