Greenland ice cores reveal historic climate clues, says study

Scientists have linked past sea ice reductions to some of history’s most extreme climate change events in the North Atlantic,

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Thawing permafrost in Canada’s Northwest Territories releasing acid that’s breaking down minerals: study

Mineral weathering likely increasing carbon dioxide released into the air and water, says study. Rapidly thawing permafrost on the N.W.T.’s

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