Canada's oil sands emit more air pollutants than previously reported

A new study reveals that Canada's tar sands operations emit air pollutants at levels significantly higher than previously estimated, posing a serious environmental and health concern.

Nicholas Kusnetz reports for Inside Climate News.


In short:

  • The study, published in Science, used aircraft measurements to find organic carbon emissions from Canada's tar sands are 20 to 64 times higher than reported by companies.
  • These emissions include compounds contributing to hazardous air pollution and particulate matter that can travel long distances, affecting air quality far beyond the immediate area.
  • The findings highlight a critical underestimation of pollution levels, raising concerns about the health impacts on local and distant communities.

Key quote:

"The absolute magnitude of those emissions were a lot higher than what we expected."

— John Liggio, research scientist, Environment and Climate Change Canada

Why this matters:

This revelation underscores the often-underestimated environmental impact of oil sands operations, directly affecting air quality and health outcomes. It also raises significant questions about current regulatory practices and the need for more accurate pollution monitoring, resonating with broader environmental and health concerns on a national scale.

Be sure to read about the Native tribes, hell-raisers and lawyers who have combined to battle pipeline projects.

A wooden gavel sitting on top of a law book

Arizona officials consider lawsuit over EPA's greenhouse gas regulation rollback

Arizona officials consider lawsuit over EPA's greenhouse gas regulation rollback as advocates warn of impact on heat-plagued state.

The scales of justice sitting on a desk with a courtroom in the background

Michigan sues fossil fuel companies while Alberta protects them

While Michigan lawmakers are taking fossil fuel companies to court for delaying the green transition, the Alberta government is hampering clean energy.
green trees in a tropic forest under fog

Forests don’t just store carbon. They keep people alive, scientists say

A sweeping scientific review finds that forests regulate temperature, stabilize water cycles and reduce heat-related risks in ways that directly protect human well-being.

A heat pump attached to the side of a house

Heat pump sales dipped in 2025. They still beat gas…

Yet again, heat pumps were the most-shipped heating appliance in the U.S. And experts say the factors behind last year’s sales slide are temporary.
A person holding a drone aloft

Thermal drone footage shows Musk's AI power plant flouting clean air regulations

Images confirm xAI is continuing to defy EPA regulations in Mississippi to power its flagship data centers.
Posing as a wind turbine blade with National Renewable Energy Laboratory (NREL) and Department of Energy (DOE) staff
Photo Credit: Gregory Cooper / NREL https://www.flickr.com/photos/nrel/ Creative Commons: https://creativecommons.org/licenses/by-nc-nd/2.0/

Federal energy lab reduces workforce, cutting 134 jobs

A federal research lab formerly known as the National Renewable Energy Lab laid off more than 100 people this week.

white pollution from smokestack billows over skyline during sunset.

Trump repeals U.S. government’s power to regulate climate

Nearly 17 years after the Environmental Protection Agency declared that carbon dioxide and other greenhouse gases threaten the public’s health and welfare, the agency on Thursday rescinded the landmark legal opinion underpinning a wave of federal policies aimed at climate change.

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.