Strange how the study doesn't address the main reasons why I would tend to favor organic foods: less pesticides, its the only way (at least in Canada) to control GMOs in what you eat. Of course there would be other environmental reasons as well, but it still remain based on monocultures.
I checked Wikipedia (http://en.wikipedia.org/wiki/Organic_certification#North_Ame...) and it says that the Government has published a set of Guidelines but applying organic labels is up to "Private Sector"...
However, doing some more google-fu I found (http://www.inspection.gc.ca/english/fssa/orgbio/orgbioe.shtm...) which seems to imply that on June 30, 2009 the Canadian Government finally got it's Organic ducks-in-a-row.
So, that seems to imply that only within the last month did Canada actually gain an Organic label that is regulated and trustworthy: http://www.inspection.gc.ca/english/fssa/orgbio/stainte.shtm...