Polar bears are increasingly exposed to diseases due to warming Arctic

As the Arctic warms rapidly, polar bears are encountering new pathogens, posing health risks to these animals and potentially altering the ecosystem.

Kasha Patel reports for The Washington Post.


In short:

  • Polar bears off the Alaskan coast are facing more diseases as melting sea ice forces them to spend more time on land.
  • Blood tests from recent decades show that exposure to pathogens has increased significantly among the bears.
  • Warmer temperatures are also speeding up the spread of ticks, mosquitoes and other disease carriers in the Arctic.

Key quote:

"Warmer temperatures accelerate the growth rates of pathogens and vectors, such as ticks and mosquitoes."

— Khaled Abass, toxicologist at Finland’s University of Oulu

Why this matters:

As the Arctic ecosystem shifts due to climate change, animals like polar bears face increased exposure to diseases that could weaken their populations. These changes may have cascading effects on the environment and human health as well.

Related EHN coverage: WATCH: The economics of biodiversity

A farmer crouching in a dry field with a harvester in the background

Environmental economist explains how climate change is pushing agricultural systems to the brink

Extreme temperature swings are disrupting crops and endangering agricultural workers; we spoke with environmental economist Shouro Dasgupta about farming in an overheating world.

A view of a flooded barn

Enviros say Supreme Court decision boosts states' ‘climate superfunds’

The Trump administration is suing Vermont and New York for using novel tactics to curb greenhouse gas emissions.
Tesla charging station

Tesla semis are about to hit the road. That’s good news for California

Thanks to state incentives, the long-range, lower-cost electric trucks are affordable. Widespread adoption could help California meet clean-trucking targets.

A pedestrian zone in a British city

Here's what happens when cities kick out cars

Campaigners believe car-free zones would result in cleaner air and less noise, as well as creating more space for trees that would help reduce heat and contribute to better public health.

A woman with her finger on a wall thermostat, changing the temperature

Democrats used to back energy-saving plans. Now they're wavering

Utility bills are rising. So why are politicians from both parties targeting measures that have saved Americans trillions of dollars?
Sign with arrow indicating a "TSUNAMI EVACUATION ROUTE"

A landslide in Alaska set off a Tsunami. There may be more to come

Scientists say as glaciers retreat in a warming climate, landslide-generated tsunamis are likely to become more frequent.
Wastewater pipes with associated valves and controls

Methane leaking from city sewer pipes is a growing climate threat

City sewer pipes may release far more methane than previously estimated, revealing an overlooked source of climate-warming emissions.
From our Newsroom
Multiple Houston-area oil and gas facilities that have violated pollution laws are seeking permit renewals

Multiple Houston-area oil and gas facilities that have violated pollution laws are seeking permit renewals

One facility has emitted cancer-causing chemicals into waterways at levels up to 520% higher than legal limits.

Regulators are underestimating health impacts from air pollution: Study

Regulators are underestimating health impacts from air pollution: Study

"The reality is, we are not exposed to one chemical at a time.”

Pennsylvania governor Josh Shapiro speaks with the state flag and American flag behind him.

Two years into his term, has Gov. Shapiro kept his promises to regulate Pennsylvania’s fracking industry?

A new report assesses the administration’s progress and makes new recommendations

silhouette of people holding hands by a lake at sunset

An open letter from EPA staff to the American public

“We cannot stand by and allow this to happen. We need to hold this administration accountable.”

wildfire retardants being sprayed by plane

New evidence links heavy metal pollution with wildfire retardants

“The chemical black box” that blankets wildfire-impacted areas is increasingly under scrutiny.

Stay informed: sign up for The Daily Climate newsletter
Top news on climate impacts, solutions, politics, drivers. Delivered to your inbox week days.