Canada's oil sands pollution significantly underestimated

A recent study reveals that air pollution from Canada’s oil sands is up to 64 times higher than industry reports, matching the total emissions from all human-caused sources in Canada.

Ruth Kamnitzer reports for Mongabay.


In short:

  • The study used aircraft sensors to measure a wider range of pollutants than industry methods.
  • Emissions include volatile organic compounds and particulates harmful to health.
  • Indigenous communities have long expressed concerns about health impacts from oil sands pollution.

Key quote:

"The magnitude of emissions observed from oil sands operations was surprising, compared both to their reported emissions and to the total from all anthropogenic sources across Canada."

— John Luggio and Drew Gentner, study authors

Why this matters:

The underestimation of emissions raises significant health concerns, particularly for nearby Indigenous communities. The oil sands, one of the largest industrial projects in the world, have been under scrutiny for their environmental impact for years. This new data suggests that the true extent of their pollution is much greater, posing increased risks to air quality and health in surrounding communities.

A small black boy sitting on his father's shoulders while looking into the camera

Study of 20,000 Nigerians explores the links between drug use, climate change and poverty

Evidence strongly suggests that climate stress leads to poverty, which leads to distress, which leads to substance use.

Two people looking at documents at a desk with the scales of justice and a wooden court gavel

How climate and health science is turning international law into action

The 2025 Lancet Countdown Report on Health and Climate Change found that since the 1990s, the rate of heat-related deaths has jumped 23% to 546,000 a year.

A view of an iceberg both above and below the water line
Credit: Victor/Unsplash+

The ocean circulation that persists even after a key AMOC component fails

A new study suggests cross-hemispheric overturning circulation could continue for centuries, even as North Atlantic Deep Water formation shuts down.
A view of a green terraced hillside

Photos: Taiwan’s tea revival blends ancient terraces with new climate adaptations

Climate change is making the revival harder, with earlier-dissipating mist, erratic rainfall, and increasingly intense typhoons threatening tea plants and increasing landslide risks.

An illustration of an AI chat bot with purple wires next to it

How AI chatbots may be talking people out of climate action

Across 28,800 prompts, models were 7.5 times more likely to advise “stay the course” than “change,” even when the status quo is anti-climate.
A man in an orange vest looking up at an oil pump jack

Climate activists protest African Energy Week in South Africa

Activists challenged efforts to position Africa as a new frontier for fossil fuel development, arguing that further investment would worsen climate change.

An illustration of a pipeline heading towards an energy plant

Opinion: Wisconsin doesn’t have to accept new gas plants as inevitable

WE Energies says Wisconsin needs a new methane gas plant to meet growing electricity demand. Citizens deserve more information.
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.