Because one of the driving forces behind the Harper bio-fuels plan is the Canadian Renewable Fuels Association (the CRFA), who helpfully ran pro-ethanol ads for the Tories back in early 2007(*).
Because the CRFA is nothing more than the front group for a consortium of agri-businesses, numbering Archer Daniels Midland (ADM) among their members.
Because on the ADM Board of Directors is one M. Brian Mulroney.
All makes sense now, doesn't it?
(*) And whose executive director, Kory Teneycke, quit the CFRA last November to become the Tory's head garbologist.
Just as an aside, environmentalists have always looked askance at ethanol. It has been embraced by governments because it allows them to multi-task, giving them a green sheen and throwing a bone to an established, powerful constituency (farmers) all in one fell swoop.