Study suggests that if climate change continues unabated, there soon won't be enough snow in northern Alaska for polar bears to dig birthing dens.
There may not be enough snow in northern Alaska for polar bears' birthing dens.
INSIDE SCIENCE: The key science stories from September 2019.
Why will polar bears become extinct in the next century? - Quora
Displaying items by tag: 氣候變化
This Is Our Last Chance To Save Polar Bears From Extinction
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Explained: How climate change is making the life of polar bears difficult
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Displaying items by tag: 氣候變化