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 bobblehead of President Donald Trump on the floor of the Arizona House of Representatives
Credit: Gage Skidmore/ https://www.flickr.com/photos/gageskidmore/5427075... https://creativecommons.org/licenses/by-sa/2.0/

With Trump absent from COP30 talks, the world moves on without U.S.

As scientists sound the alarm, the world is committing to climate action “with or without the United States.”
Statsminister Jonas Gahr: Speaker at COP30
Credit: https://www.flickr.com/photos/statsministerenskontor/ Creative Commons Foto: Martin Lerberg Fossum https://creativecommons.org/licenses/by-nc/4.0/

Fossil fuel lobbyists outnumber all Cop30 delegations except Brazil, report says

One in every 25 participants at 2025 UN climate summit is a fossil fuel lobbyist, according to Kick Big Polluters Out
An oil drilling pump jack platform with a worker standing on it

Gavin Newsom calls for climate action. But even California is drilling more oil

Gov. Gavin Newsom made green energy a priority. But as President Donald Trump makes oil the focus of U.S. energy policy, even California considers “Drill, baby, drill.”
An illustration of the globe with a giant band aid on it

Podcast: Will we artificially cool the planet?

Professor Ted Parson talks about solar geoengineering as a potential response to severe climate risks, exploring why humanity may need to consider deliberately cooling Earth by spraying reflective particles in the upper atmosphere.

A group of dead trees in a forest

2021 heat dome left Rhode Island-sized damage in Oregon's, Washington’s western forests

A study from Oregon State University and the U.S. Forest Service found the four-day extreme heat event scorched more than 1,000 square miles of tree canopy.

A person walking through a flooded underpass

Bill Gates said the quiet part out loud

Bill Gates has reignited debate over a climate agenda that prioritizes emissions cuts over the immediate needs of countries already facing deadly climate impacts.

Polluted water coming from a pipe

Oily waste from Smitty’s Supply disaster will be injected under Jefferson Parish landfill

Oily water and spilled petrochemicals from the Smitty’s Supply explosion have been handled at three different sites, and state officials have granted an emergency request to bring some of it a Jefferson Parish landfill. 
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.