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Obama at Summit: ‘We Have to Answer the Climate Call’

World leaders gathered on Tuesday to talk climate change at the United Nations Headquarters.

Pacific Northwest Warming May Have Natural Roots

Natural variations might be behind much of the warming in and around the Pacific Northwest.

People’s Climate March Makes Front-Page News

Here's how newspapers portrayed Sunday's Climate March around the globe.

Think You’re a Climate Whiz? Take the Quiz

Test your knowledge with this quick quiz, and find out if your climate expertise can take the heat.

Report: Prevent Climate Effects by Fixing World Economy

Reducing emissions can generate better growth than old high-carbon model, says co-author of report, Lord Stern.

The $90 Trillion Climate-Stabilizing Cookbook

A new report shows how the world could become wealthier by spending more on clean energy infrastructure.

UN Highlights Climate Big Data Ahead of Summit

Two projects showcase how big data can help understand and plan for climate change.

A Tale of Two Cities: Miami, New York and Life on the Edge

Like New York, Miami faces the challenge of rising seas, but with a number of critical differences.

6 Degrees: Farming, Glaciers and Epic Flooding

This week has everything from saving tons of CO2 to the climate context of New England's epic floods.

Indigenous Groups Give Tropical Forests a Carbon Boost

Tropical forests managed by local communities have the potential to sequester huge amounts of carbon.

Toledo’s Algae Bloom in Line with Climate Projections

Climate change could make the Great Lakes' harmful algae blooms more toxic and last longer.

6 Degrees: Star Wars, Energy Ranks, Cool Pics & More

Find out what you missed in climate news this week in our 6 Degrees weekly roundup.

Planet is Running a Temp: State of the Climate ‘Check-Up’

A new report -- the latest checkup on the health of the global climate system -- says the planet is running a temperature.

Weather Disasters Have Cost the Globe $2.4 Trillion

A new report shows just how costly climate- and weather-related disasters are across the globe.

Military Bases Face Hurdles in Climate Change Adaptation

The military is already looking at its climate change vulnerabilities but more needs to be done.

Basis for EPA Clean Power Plan Cuts a ‘Mystery’

The biggest CO2 emitter won’t need to make the biggest emissions cuts under the EPA's Clean Power Plan.

Downpour Floods City Ahead of U.S. World Cup Match

A sudden, heavy downpour in Recife, site of today's crucial U.S. soccer match, has left the city flooded.

5 Graphics That Show U.S. Climate Change Costs

Graphics from a new report show just how much climate change will cost U.S. and what regions will lose the most.

New Report Puts Price Tag on Climate Change in U.S.

A new report by the Risky Business Project quantifies the impacts of climate change on the U.S. economy.

San Franciscans in the Dark About Flood Hazards

A citywide effort is tackling a problem that few residents think about: rising seas and coastal erosion.

Gallery

2012 Global Carbon Emissions Human-generated emissions of CO2 this year are expected to reach 35.6 billion tons.