Learn about the threats polar bears face—including the biggest one of all: climate warming.
Polar bears rely on sea ice to hunt, breed, roam, and sometimes to den. But the Arctic is warming and ice is melting due to human-caused climate change.
Already, in parts of the Arctic, longer ice-free seasons and longer fasting periods have led to a decline in some polar bear populations.
Research shows that without action to greatly reduce carbon emissions and stabilize our climate, we could lose all but a few polar bear populations by the end of the century.
Climate change calls for a new approach to conservation—we can’t build a fence around the polar bear’s melting habitat, and we can’t assign wildlife officers to guard the gate. The key to getting the climate back to functioning the way it should is to transition away from fossil fuels for energy altogether.
When will polar bear populations collapse? The answer is up to us.
A new study forecasts the future for polar bears based on two different emission scenarios.
Protecting Dens Means Protecting Cubs
Denning is the most vulnerable time in a polar bear’s life. And in a warming Arctic, where polar bears face enormous challenges, the survival of every single cub is critically important.
Conflicts & Encounters
As the sea ice melts and more polar bears spend more time on shore, and for longer periods, conflicts between polar bears and people are expected to increase.
Indeed, many coastal villages are already experiencing an uptick in encounters with polar bears, sometimes with tragic results.
Working proactively with communities to support their efforts to live safely with polar bears is an important—and growing—part of our work.
The polar bear’s natural environment may seem white and pristine—far removed from the pollution in major cities and industrial areas.
But in reality, polar bears in some parts of the Arctic can carry surprisingly high loads of toxic chemicals.
Why? Because wind and ocean currents transport these pollutants to parts of the Arctic, where they concentrate as they make their way up the food chain. Polar bears absorb these higher levels when they eat seals.
Reducing these pollutants will not only help polar bears, but people, too.
Like most bear species, polar bears are not very prone to disease.
Some viruses have been detected in polar bears in Alaska and Russia. In addition, some parasites, like Trichinella, are known to have infected the bears.
The big concern for scientists is that more diseases will be introduced as the Arctic warms, due to increased human activity and the migration of lower-latitude species to the Far North.
In the past, unregulated commercial and sport hunting posed the gravest threat to the polar bear’s future. That challenge has been eased thanks to international regulations and careful management.
Today, legal harvesting continues on a limited basis for Indigenous peoples, based on quota systems. These hunts have long been an important part of Aboriginal cultural traditions and provide important nutritional benefits in some regions.
As we head into a less stable future, vigilance is needed to make sure these limited hunts remain sustainable.
Threats to Polar Bear Denning Area
Proposed seismic testing, road building, and drilling in the Arctic National Wildlife Refuge pose significant threats to denning mother bears and their cubs.
10 Apr 2019
Pollution in Polar Bears
Scientists have discovered hundreds of new contaminants in blood samples from polar bears, including chemicals of unknown origin.
12 Dec 2018
Their future is in our hands
The International Union for Conservation of Nature (IUCN) classifies the polar bear as a vulnerable species. Given the nature and breadth of the threats polar bears face, it will take adaptive management today––coupled with aggressive action on climate change globally––for the species to survive in the long run.