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Emperor penguins could march to extinction if nations fail to halt climate change


PhysOrg
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The concept of a canary in a coal mine – a sensitive species that provides an alert to danger—originated with British miners, who carried actual canaries underground through the mid-1980s to detect the presence of deadly carbon monoxide gas. Today another bird, the emperor penguin, is providing a similar warning about the planetary effects of burning fossil fuels.

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