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PBS News Hour
Why we’re ‘perilously close’ to a global warming threshold
This past week, the EPA said it is reconsidering the scientific finding that greenhouse gases are a danger to public health. This comes as research shows average global temperatures in 2024 likely rose above a 1.5 degree Celsius threshold that for years has been a red line for climate change. Ali Rogin speaks with Michael Mann at the University of Pennsylvania to learn more.
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