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Scientists link greenhouse gas emissions to polar bear population declines ...Middle East
Planet-warming greenhouse gas emissions pose a direct threat to the survival of polar bears — by limiting their access to the sea ice that serves as their hunting grounds, a new study has found. During ice-free summer months, the bears must fast, which in worst-case scenarios mean adults could die and, before then, lose the ability to successfully raise cubs, according to the study, published Thursday in the journal Science. The first-of-its-kind research quantifies the amount of ice-free days caused by specific amounts of emissions, as well as associated polar bear survival rates and declining trends in some subpopulations. “We’ve known for decades that continued warming and se
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