A map showing where reindeers (and caribou, the North-American name given to the same species) live. Climate change is a problem. The temperature, the weather and the landscape are all changing in the Arctic. As the Arctic ice sheet melts, the sea levels rise, eliminating the land that reindeer, polar bears, seals and other wildlife depend on for survival. Our reindeer population has declined 40% over the past 21 to 27 years due to climate change and habitat disturbance caused by humans.