BOSTON — For many environmental advocates, the most pressing issue is the fate of the Keystone XL oil pipeline, which Democratic Rep. Ed Markey opposes but Republican candidate Gabriel Gomez supports.

WASHINGTON — If approved, the resulting export boom could lead to further increases the drilling technique known as fracking.

BOSTON — Massachusetts is part of a coalition of states considering massive bids for renewables that could reshape the New England energy market.

STOUGHTON, Mass. — The weak tornado, with wind gusts from 65 to 85 mph, touched down in the area of Washington Street in Stoughton at about 4:30 p.m. on Thursday.

BOSTON — The Solid Waste Master Plan modifies a decades-old ban on new facilities that burn waste.

The EPA says the drilling process known as fracking releases less methane into the atmosphere than previously thought. But uses up vast quantities of water and researchers say it has caused earthquakes.

BOSTON — As of May 1, fishermen who chase bottom-dwelling groundfish face cuts that fishermen say will destroy the industry.

Much of the Midwest has been experiencing severe flooding in recent weeks, including Illinois, Missouri, Iowa, Indiana, North Dakota, Mississippi and Michigan.

A group called the Archangel Ancient Tree Archive is cloning some of the oldest and most massive trees on Earth, and planting the saplings in locations around the world.

CONCORD, Mass. — Federal budget cuts are threatening the national park that honors the first battles of the American Revolution.

PORTLAND, Maine — This year’s harvest will go down as the smallest since 1978, when the fishery was shut down altogether.

BOSTON — Opponents will be in court Thursday arguing for a permanent injunction against research that which deals with some of the deadliest pathogens.

BOSTON — The decision comes a day after Town Meeting refused to authorize spending $14 million to tear down the turbines.

BOSTON — Falmouth’s Town Meeting voted down a measure Tuesday night that would have authorized borrowing $14 million to dismantle two turbines.