Diana DeGette takes on refinery over air quality fears  The Denver ChannelEditor's Note: Denver7 360 stories explore multiple sides of the topics that matter most to Coloradans, bringing in different perspectives so you can make up your ... Read …

Are smoke plumes from Suncor oil refinery safe?  The Denver ChannelIn picturesque Downtown Denver where skyscrapers frame Rocky Mountain peaks, there's a hidden polluter five miles north of the city. Read more https://www.thedenverchannel.com/new …

The Globe and MailOil sands companies turn to solvents for low-cost crude extractionThe Globe and MailHigh costs and pressure to reduce pollution are forcing companies such as Imperial Oil Ltd. and Suncor Energy Inc. to accelerate testing of new technologi …