Polar bears are the most ice-dependent large mammal on Earth. Rapid Arctic warming is reducing sea ice hunting platforms, driving longer fasting periods, nutritional stress, and increasing human-wildlife encounters.
Polar bear welfare is experiencing a slow-motion crisis driven entirely by climate change. Individual bears face prolonged fasting periods as the ice retreats earlier in spring and forms later in autumn - what was historically a 3-4 month ice-free summer is becoming 5-6 months in affected populations. The nutritional stress is particularly severe for pregnant females and cubs, who require adequate fat reserves to survive denning and early cub development. Bears entering human communities in search of food face lethal control responses. The welfare of polar bears is directly and proportionally tied to the trajectory of global greenhouse gas emissions. No local conservation intervention can address the fundamental challenge of warming that eliminates the sea ice polar bears require.