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SOURCE: The Guardian

DATE: October 18, 2017

SNIP: Alberta’s oil and gas industry – Canada’s largest producer of fossil fuel resources – could be emitting 25 to 50% more methane than previously believed, new research has suggested.

The pioneering peer reviewed study, published in Environmental Science & Technology on Tuesday, used airplane surveys to measure methane emissions from oil and gas infrastructure in two regions in Alberta. The results were then compared with industry-reported emissions and estimates of unreported sources of the powerful greenhouse gas, which warm the planet more than 20 times as much as similar volumes of carbon dioxide.

“Our first reaction was ‘Oh my goodness, this is a really big deal,” said Matthew Johnson, a professor at Carleton University in Ottawa and one of the study’s authors. “If we thought it was bad, it’s worse.”

The study then sought to conservatively extrapolate the findings, correcting only for sites that are home to heavy oil. What they found was in Alberta – home to 68% of Canada’s natural gas production, 47% of its light crude oil production as well as 80% of all crude oil and equivalents – total emissions were likely 25 to 50% higher than previous government estimates. The findings excluded mined oil sands, which are believed to be responsible for about 11% of methane emissions.