Polar bears are the largest land carnivores, inhabiting Arctic sea ice, water, and coastal areas. Males can grow to over 2.5 meters and 650 kg, while females reach 1.8-2.5 meters and 150-500 kg when pregnant. Polar bears primarily feed on seals but will also eat beluga whales, narwhals, and bowhead whales. Their habitat and ability to hunt is threatened by pollution and climate change causing sea ice to melt. Conservation efforts include reducing greenhouse gas emissions and not purchasing fur products.