News Climate

Human CO2 emissions put Arctic on track to be ice-free by 2050

For each metric ton of carbon dioxide released, a queen mattress‒sized chunk of sea ice vanishes

sea ice

THIN ICE  Arctic sea ice could vanish sooner than previously thought, according to new calculations of carbon dioxide’s direct ice-melting effects.

Patrick Kelley/U.S. Coast Guard

By Thomas Sumner

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