When Alberta Premier Ed Stelmach flew into Wyoming for the Western Governor's Association meeting this week he undoubtedly saw the full page ad in the Casper Star-Tribune decrying his province's massive oil sands operations.

Organized by Environmental Defence, and its partners ForestEthics and the Natural Resources Defense Council, the idea behind the ad was to reach out to U.S. Governors to expose the truth about Canada's dirty tar sands.

A full copy of the oil sands advertisement can be downloaded from the Environmental Defence website.