What is the polar vortex – and how is it linked to climate change? - The Guardian
- What is the polar vortex – and how is it linked to climate change? The Guardian
- Deep Freeze Expected to Ease, But Disruptions Persist NBC10 Boston
- Polar vortex freezing Midwest ignites climate change fight Washington Times
- Road chaos in US Midwest as biting polar vortex brings -50C | ITV News ITV News
- Polar Vortex Brings Bitter Cold After Snow Squalls NBC10 Boston
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