Les États-Unis tentent de sauver le papillon monarque de l'extinction.
Sink to source: Arctic tundra emitting more carbon than it absorbs
[Article] L'Arctique produirait plus de carbone qu'il n'en absorbe.
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Sink to source: Arctic tundra emitting more carbon than it absorbs.
After locking carbon dioxide in its frozen soil for millennia, the Arctic tundra is undergoing a dramatic transformation, driven by frequent wildfires that are turning it into a net source of carbon dioxide emissions, a US agency said...
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
Villagers harvest ice from a local lake near the settlement of Oy, some 70 km south of Yakutsk, Russia with the air temperature at about minus 41 degrees Celsius in November 2018