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Today, we take another look at ethanol for our weekly Greenlings post. You've probably noticed that many vehicles are labeled with a Flex Fuel badge from the manufacturer, indicating that the car or truck is capable of running safely on E85 – a blend of 85-percent ethanol and 15-percent gasoline.

Despite growing concerns that the widespread production and use of corn ethanol is actually counter-productive to reducing greenhouse gas emissions, the Canadian government is moving ahead with a mandate to require ethanol blending into all gasoline supplies. By September 2010, Canadian refiners will be required to have at least 5-percent ethanol content in all pump gas. The regulation has received cabinet approval, and if it proceeds, would require nearly half a billion gallons of ethanol annua