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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.

Picture This: Wavy Clouds & A Gnarly Nor’easter

A rare type of cloud and the sediment stirred up by Hurricane Gonzalo are among this week's highlights.

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.

What Will Winter Hold for Drought-Plagued California?

El Nino probably won't bring California drought-busting winter rains, but the news may not be all bad.

San Francisco Rising to Threat of Swelling Seas

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

To Shrink a Goat, Warm the Globe

Are rising global temperatures to blame for a stark reduction in the size of chamois in Italy?

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.

Polar Vortex Spiked U.S. CO2 Emissions in 2013

The polar vortex spurred a spike in CO2 emissions in 2013 as people cranked up their heat last winter.

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.

Regulations Could Douse North Dakota Gas Flares

New regulations in North Dakota aim to reduce CO2 emissions from flaring natural gas wells.

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.

LEDs are a Bright Idea Whose Time Has Come

LEDs could help slow global warming and illuminate the developing world. Now that's worth a Nobel Prize.

6 Degrees: Security Risks, Tornadoes and Earthquakes

A new climate report from the Pentagon, tornado trends, earthquakes and more in this week's top climate news.

Picture This: Seasonal Rainbows & A Monster Hurricane

Hurricane Gonzalo was an imposing site in images, while the sun cast a shadow across a cold front.

Climate Change Takes Center Stage on Instagram

An Instagram takeover puts climate change on display right next to selfies and latte art.

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.…

Winter Unlikely to See Repeat of Frigid Polar Vortex

The bouts of polar vortex incursions that happened last winter are unlikely this year, NOAA says.

Gallery

How Much Precipitation is Needed to End the Drought? A striking look at how much precipitation the Southwest would need over the next month to end the drought.

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