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Environment

Why vanishing sea ice at the poles is a crisis for the entire planet

Extremely low sea ice levels in the Arctic and Antarctica signal a "new normal" that may accelerate global warming and disrupt ocean currents, on top of the consequences for people and wildlife that rely on the ice

By James Dinneen

21 April 2025

The maximum extent of Arctic sea ice this winter was the lowest on record

Tony Skerl/Shutterstock

Human-caused climate change has ravaged sea ice at both ends of Earth in what may be a disturbing new normal. February this year saw global sea ice extent hit a record low as sluggish ice growth during the Arctic winter coincided with the fourth consecutive year of extremely low sea ice cover during the Antarctic summer.

鈥淚t鈥檚 like a missing piece of a continent,鈥 says at the University of Tasmania in Australia.

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