Environment | Global Warming

A new approach to measuring methane leaks revealed that the Boston area alone lost enough natural gas during one year to fuel 200,000 homes.

Preliminary estimates indicate that 2014 was a record-breaker, despite the lack of an El Niño and a slowdown in the pace of warming during the first part of the 21st century.

Thousands of climate change activists and others gathered in Manhattan Sunday for the People’s Climate March. It came just before the UN’s Climate Summit, expected to draw nearly 100 heads of state.

UN climate change chief Christiana Figueres is a long distance runner and constant traveler who calls wherever she is "home." Here is a thumbnail profile.

How UN climate change chief Christiana Figueres became a fierce crusader to lower Earth's thermostat. A visceral connection to the planet – from the now-extinct golden toads of her childhood in the Costa Rican jungle to shrinking glaciers – moves her to tears.

The People’s Climate March, scheduled for Sunday in New York and featuring everything from noisemakers to an ark, will take place just days before world leaders gather there to address global warming concerns at the UN Climate Summit.

Outside groups backed by the Koch brothers on the right and environmentalist billionaire Tom Steyer on the left are pumping millions into a race that tests whether climate issues can play well for Democrats in moderate states.

Unsafe levels of toxins in drinking water in northwest Ohio are linked to algae blooms in Lake Erie. The blooms are fed by agricultural runoff, but that's not the full story.

Five years after losing its first satellite designed to measure carbon dioxide levels in the atmosphere, NASA is finally launching a replacement.

Costs of economic disruption from global warming are likely to total hundreds of billions of dollars by 2050, a new risk assessment finds. The bipartisan report tallies losses to four sectors of the US economy.