Can we re-freeze the Arctic – and should we?

What this episode covers

Work is underway to pump seawater onto ice in Nunavut as a way to thicken it in the face of climate change. The experiment is showing some promising results but there are also concerns about its impact on ecosystems. Journalist Alec Luhn travelled onto the ice to see what was happening and to listen to local Indigenous elders about what the ice means to them. He also considers the moral hazard of trying to geoengineer a solution and whether it distracts from the real work needed to cut emissions.

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Frequently Asked Questions

How long is this episode of What On Earth?

This episode is 21 minutes long.

When was this What On Earth episode published?

This episode was published on October 18, 2025.

What is this episode about?

Work is underway to pump seawater onto ice in Nunavut as a way to thicken it in the face of climate change. The experiment is showing some promising results but there are also concerns about its impact on ecosystems. Journalist Alec Luhn travelled...

Can I download this What On Earth episode?

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