Polar bears are among the most visible victims of climate change, with sea ice loss threatening their prey access and creating welfare emergencies of increasing frequency.
Polar bear welfare deterioration is a direct, measurable consequence of climate change. Extended fasting periods — beyond the natural adaptations that allow bears to fast through winter — cause progressive malnutrition, muscle wasting, and immune suppression. Starving bears are observed in increasing numbers entering communities, where they face euthanasia as public safety threats. Cubs born to malnourished mothers have reduced survival rates. The psychological distress of increasing desperation as prey becomes inaccessible is difficult to measure but consistent with the behavioral changes observed in food-stressed bears. Every degree of warming removes sea ice and worsens the welfare of every polar bear alive. Climate action is simultaneously the most important polar bear welfare intervention available.