According to a new study published in Science, operations in Alberta’s oilsands are pumping out as much as 64 times more air pollutants than officially reported.

How could industry estimates be missing these huge amounts of chemicals?

What could the health and environmental consequences be?

How does this study add to other concerns that don't we truly understand the impact of the oil sands?

Drew Anderson is the Prairies reporter for The Narwhal, whose team of investigative journalists report on the natural world.

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