BOSTON — Nine northeastern states, including Massachusetts, agreed to put significantly stricter limits on carbon dioxide emitted by power plants in the region.

BOSTON — After nearly two decades of planning and negotiations, efforts to restore the river to its original state in order to protect the city from flooding are getting started.

BOSTON — Boston officials will spend the next six months reviewing ways to better prepare the city for climate change.

BOSTON — New England’s top fishing regulator said Friday that crippling cuts in catch limits this year are unavoidable.

BOSTON — Two separate assessments of cod stocks in the Gulf of Maine and Georges Bank are providing more evidence of their poor condition.

BOSTON — Environmental and public health activists are pushing a bill on Beacon Hill that would phase out the state’s purchase of bottled water and encourage the use of tap water.

PLYMOUTH, Mass. — The Pilgrim Nuclear Power Station shut down the plant at about 5:45 a.m. Monday.

SPRINGFIELD, Mass. — The program is designed to reduce energy consumption at 700 state facilities, saving taxpayers $43 million annually.

BOSTON — The technology shows people exactly where heat escapes, and heating efficiency programs help homeowners plug those gaps.

BRIDGTON, Maine — A new study is questioning whether climate trends could put many New England ski resorts out of business for good.

Zipcar founder Robin Chase believes that collaboration is essential to solving the world’s most pressing problems.

BOSTON — Oceans have become very loud due to man-made noise, and scientists are worried that all that added noise is hurting marine life.

WAKEFIELD, Mass. — Frustrated fishermen say the flailing industry will collapse under more reductions.

BOSTON — Nancy Brennan has led the conservancy since its creation in 2005.