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Europe Reaches Climate Deal, Sends Message

The European Union plans to reduce its greenhouse gas pollution to 40 percent below 1990 levels by 2030.

One of Sao Paulo’s Biggest Reservoirs Is Nearly Dry

Drought is taking its toll on the water system that quenches the thirst of Brazil’s largest city, Sao Paulo.

San Francisco Rising to Threat of Swelling Seas

A new checklist will help San Francisco protect $25 billion worth of infrastructure from rising seas.

Massachusetts, California Lead U.S. In Energy Efficiency

Massachusetts and California lead the U.S. in energy efficiency, according to annual ranking.

What’s The Deal With Europe’s Climate Talks?

European Union will decide this week how hard the continent will work to slow global warming.

Zombie Glacier Surprises Scientists

Discovery of a semi-lifeless glacier in southeastern Iceland creates a new zombie class of frozen rivers of water.

El Niño Brings Floods, Risks — and Opportunities

El Niño ups the odds of flooding in some spots, but that information could provide opportunities.

Hot News: 2014 On Track to Become Warmest Year

The "odds are good" that 2014 will be the warmest year in the books, fueled by record ocean warmth.

Jack Frost Not Exactly Nipping at Your Nose

The frost-free season is growing longer across the U.S. overall. Check the trend in your city.

Tornado Days Decreasing, but Number Per Day Rising

Tornadoes are seeming to cluster together so that there are fewer days with tornadoes, but more tornadoes on the days that do have them.…

Frost Free Season is Getting Longer

All regions of the continental U.S. have seen the frost-free season, defined as the stretch between the last below-32°F reading in the spring…

September Was Warmest on Record, NASA Data Shows

September 2014 was the warmest September since 1880, updated NASA data shows.

Expanding Antarctic Sea Ice is Flooding ‘Warning Bell’

Expansion of Antarctic sea ice heralds ocean changes that could trap heat and accelerate ice sheet melting.

Fish Fail to Adapt to Rising CO2 Levels: Study

Rising CO2 levels could spell disaster for certain fish species according to recent research.

The $9.7 Trillion Problem: Cyclones and Climate Change

Cyclones have been quietly costing the world for decades, costs that could grow due to climate change.

Sea Level Rise Making Floods Routine for Coastal Cities

Floods during high tide have become common in many coastal cities, and they're about to become downright routine.

Study: Renewables As Green As You’d Expect

Future wind and solar projects and metals used to build them will have a low environmental impact, study says.

Antarctic Sea Ice Officially Hits New Record Maximum

For the third year in a row, Antarctic sea ice has hit a record maximum winter extent.

Drought Dries Up California Hydropower

Normally, 20 percent of California’s power comes from hydroelectric sources. But not anymore.

Oceans Getting Hotter Than Anybody Realized

Study finds the upper levels of the planet’s oceans have been warming much faster than previously realized.

Gallery

Winter Olympics in a Warming World If global warming continues unabated, only 6 of the 19 previous host cities could host the Winter Games again by the 2080s.

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