Air Pollution From Canadian Tar Sands Up to 6,300% Worse Than Scientists Thought
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“In quantifying the astonishing and largely unreported levels,” said a Greenpeace campaigner, “these scientists have validated what downwind Indigenous communities have been saying for decades.”
January 25, 2024
Aircraft measurements of pollutants over the Athabasca tar sands in Alberta, Canada show levels exceeding industry reports by 1,900% to more than 6,300%, scientists revealed Thursday, underscoring the need for humanity to rapidly phase out fossil fuels.
While the Canadian government requires air quality monitoring around oil sands operations, industry figures focus on certain compounds. For this research, published Thursday in the journal Science, experts from Yale University and Environment and Climate Change Canada, a department of the Canadian government, accounted for a wider range of emissions.
After collecting data from 30 flights around 17 tar sands operations in 2018, “what we saw were very large emissions of total gas-phase organic carbon from these facilities,” said co-author and Yale professor Drew Gentner in a statement. “On average, the majority of the total gas-phase organic carbon was from often overlooked compounds, which are typically outside of the scope of routine monitoring.”
“This report backs up what the communities living in these areas experience—it is so bad they cannot open their windows because it hurts their lungs to breathe—especially at night.”
Co-author John Liggio of Environment and Climate Change Canada noted that “the magnitude of the observed emissions from oil sands operations was larger than expected, considering that it was roughly equivalent to the sum of all other anthropogenic sources across Canada when including all the motor vehicles, all the solvents, all the other oil and gas sources, and everything else reported to the inventory.”
Nadine Borduas-Dedekind, a University of British Columbia atmospheric chemist who has worked with Liggio but was not involved with this study, toldNature that “I’m concerned by how big this number is.”
“You want to be measuring all this carbon. For air quality, for health, but also for climate,” she said, explaining that some of the molecules are oxidized to planet-heating carbon dioxide.
Thanks to the tar sands deposits across northern Alberta, which are estimated to contain 1.7-2.5 trillion barrels of oil, Canada trails only Saudi Arabia and Venezuela in terms of total known reserves.
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