IPCC The Intergovernmental Panel on Climate Change Report
Greenland's ice sheet has undergone a stunning reversal in the last 46 years, as a meticulous new study documents.
Sea level rise is occurring right now, but the magnitude and speed of the rise in the future is still a big unknown.
Members of about 100 countries have joined together to issue a new report that emphasizes the immediacy of dangers related to climate change.
Countries tallying their total greenhouse gas emissions can now get a better estimate thanks to two new reports adopted this week by the Intergovernmental Panel on Climate Change.
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