Polar bears are experiencing measurable welfare decline as Arctic sea ice loss forces longer fasting periods, reduces hunting success, and increases physiological stress in a rapidly changing ecosystem.
Climate change is causing measurable welfare deterioration in polar bear populations on a trajectory that will worsen dramatically without emissions reductions. Prolonged fasting beyond physiological reserves causes genuine suffering: bears with insufficient fat stores experience hunger and metabolic stress over weeks to months. Cubs born to nutritionally compromised mothers have reduced survival rates and may themselves face prolonged nutritional deprivation. The increased contact between food-stressed bears and human settlements creates conflict situations that result in bear deaths via deterrence or culling. At the population scale, the welfare impact of climate-driven habitat loss dwarfs any other threat to polar bear wellbeing. Unlike most wildlife welfare issues, which can be addressed through local management interventions, polar bear welfare depends on global greenhouse gas emissions reductions — a systemic challenge of unique scale.