Scientists identify thousands of sites in the Arctic where methane stored for millennia is bubbling out, potentially accelerating global warming.

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Arctic melt releasing ancient gas

In recent years, climate change skeptics have seized on one last argument that cannot be so readily dismissed. Their theory is that clouds will save us.

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Temperature Rising: Clouds’ Effect on Climate Change Is Last Bastion for Dissenters

A large majority of Americans believe that this year’s unusually warm winter and last year’s blistering summer were likely made worse by global warming, according to a survey.

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Americans Link Global Warming to Extreme Weather, Poll Says

“Follow the money.” As a young journalist on the political left, I often heeded this well-worn advice. If conservatives were denying the science of global warming, I figured, big fossil-fuel companies must be behind it. After all, that was the story with the tobacco industry and the dangers of smoking. Why not here? Read full article > >

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Liberals and conservatives don’t just vote differently. They think differently.

Amid seesawing temperatures, suspicion is focused on the decline of sea ice in the Arctic, believed to be a consequence of the human release of greenhouse gases.

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Arctic Sea Ice Eyed for Clues to Weather Extremes

Washington’s cherry blossoms are busting out early this year, with buds popping so fast that a government work crew this week watched them unfurl on one tree in a single day. The U.S. National Park Service had predicted an early bloom for the centennial year of the hallowed trees . But it has moved up the forecast twice, with temperatures in the 80s and more of the same expected. Read full article > >

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Could cherry blossoms one day be blooming in winter?

With global efforts to reduce carbon dioxide emissions stalled, the United States and five other countries are launching a new program to cut other pollutants — including methane, soot and hydrofluorocarbons — that also contribute to global warming. Read full article > >

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U.S. will lead new effort to cut global warming from methane, soot

The original e-mails, released in 2009, sowed doubts about scientists’ research and integrity and galvanized skeptics of global warming.

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New Speculation on Who Leaked Climate-Change E-Mails

Facing political hostility and lacking adequate financing, scientists are struggling to report on the causes of a concentrated span of extreme weather in the United States.

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News Analysis: Climate Scientists Hampered in Study of 2011 Extremes

People who crave a cause often have selective hearing, and this is particularly true in the current debate about global warming, writes Lisa Jardine.

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Climate change and craving a cause

Experts worry that if the permafrost thaws in the Northern Hemisphere, huge amounts of carbon will be released into the air, greatly intensifying global warming.

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Temperature Rising: Warming Arctic Permafrost Fuels Climate Change Worries

More than 190 nations agreed to work toward a treaty that would require all countries to reduce emissions that contribute to global warming.

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U.N. Climate Talks End With Deal for New Emissions Treaty

Agreement on new measures to combat global warming appears within reach at the UN climate talks in South Africa, but time is running short.

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Time runs short for climate deal

Todd S. Stern faced criticism from fellow envoys, activists and one impassioned heckler, Abigail Borah, a student at Middlebury College, over what they saw as foot dragging.

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U.S. Climate Envoy Seems to Shift Position on Timetable for New International Talks

Global emissions of carbon dioxide from fossil-fuel burning jumped by 5.9 percent, upending the notion that a decline during the recession might persist.

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Record Jump in Carbon Emissions in 2010, Study Finds