Innovative aircraft-based technique records carbon emissions not tracked before from the industrial region
Canada’s controversial oil-producing tar sands generate a substantial amount of unaccounted-for carbon-based emissions that can affect air quality, according to measurements taken by aircraft. The sands release more of these pollution-causing gases than megacities such as Los Angeles, California, and about the same as the rest of Canada’s human-generated sources combined — including emissions from motor traffic and all other industries.
“No rules have been broken, or guidelines exceeded here,” says Janetta McKenzie, an oil and gas analyst for the Pembina Institute, a think tank in Calgary, Canada. “But that speaks to some issues in our rules and our guidelines.”How a dangerous stew of air pollution is choking the United States
The team that conducted the study — led by environmental engineer Drew Gentner at Yale University in New Haven, Connecticut, and chemist John Liggio at the federal agency Environment and Climate Change Canada (ECCC) in Toronto — used an innovative approach to measure all the carbon-based molecules in the air over oil sands in the province of Alberta. The researchers factored out greenhouse gases such as carbon dioxide and instead tracked only molecules important to air quality, many of which haven’t been monitored at the oil sands before. These carbon-based gases can seed particulate pollution in the air and react with other chemicals to form ground-level ozone.
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