Watch 9:53
World needs to make near-revolutionary change to avoid imminent climate disaster. Is there hope?
Unless we immediately reduce the burning of coal and oil and gas that drive up global temperatures, a new UN report warns the world will suffer tremendous consequences as early as 2040. William Brangham talks with Rafe Pomerance of the…
Why the Paris talks won’t prevent 2 degrees of global warming
Only one action could prevent the world from surpassing 2 degrees of global warming, but does this benchmark even matter?…
UN report: Without action, climate change effects will be ‘irreversible’
The United Nations warned Sunday that the world must get most of its energy from renewable sources by 2050, or increase the likelihood of what it called "severe, pervasive and irreversible damage."…
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Feared Trout Drop-off Signals Climate Shift in Montana
Warmer temperatures and a longer summer drought season in Montana are expected to have significant impacts on the state's trout fishing industry and ecosystem. In a special report, Heidi Cullen of Climate Central examines how climate-related changes are affecting Montana.
Leaders of the Group of Eight nations agreed Tuesday to cut greenhouse gas emissions in half by 2050. But on Wednesday, a group of five emerging economies refused to sign the deal, saying they want more aggressive emissions cuts. A…
Former Vice President Al Gore and the Intergovernmental Panel on Climate Change won the Nobel Peace Prize Friday. Michael Oppenheimer, a member of the U.N. panel, discusses the honor and how the group's work has furthered the debate on climate…
Residents of Greenland's west coast say they are feeling the effects of rising sea temperatures in the fishing and tourism industries. NewsHour correspondent Spencer Michels reports on the research into whether the changes are climate change-related.
The Intergovernmental Panel on Climate Change issued a report Friday saying temperatures and sea levels will continue to rise for centuries even if greenhouse gas emissions stabilize. An expert and a report co-author discuss the findings.
The evidence for global warming is "unequivocal" and it is "very likely" that human actions are to blame for rising temperatures, an international panel of climate experts said Friday.
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