New research has found that a complex form of air pollution from Alberta's oilsands has gone largely unreported — and the ...

Millions of people in North America have been warned about the health risks of poor air quality, as toxic wildfire smoke from Canada drifts ... per year due to air pollution.

Los Angeles is already infamous for poor air quality. But the fires scorching the area now are sending up plumes of black ...

Canada, bought those plants the separate permits remained even though all three plants are now owned by one operator. Both permits were long overdue when CDPHE’s Air Pollution Control Division ...