Edmonton Journal: Alberta’s plan to allow in-situ oilsands operations to switch from natural gas to dirtier fuels would significantly increase greenhouse gas emissions and air pollution, the Pembina Institute said Friday. The environmental think tank was responding to a draft policy, which was open for public comment until Friday. The policy would set standards for more carbon-intensive fossil fuels such as raw bitumen or the waste from oilsands upgrading (petroleum coke and …