The primary reason that polar bear populations are declining is because the higher temperatures resulting from climate change cause them to overheat due to their thick fur.

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The primary reason for declining polar bear populations is not overheating due to thick fur but rather the loss of sea ice, which is essential for hunting their primary prey, ringed seals. Climate change is causing the Arctic sea ice to melt earlier in the spring and form later in the fall, reducing the amount of time that polar bears have to hunt and store up fat reserves for the winter. Additionally, some populations are experiencing food shortages and increased competition for resources as a result of climate change.

The Primary Reason That Polar Bear Populations Are Declining Is