A thin border separates the Boreal Forest from an open-pit mine. Clear cutting and deforestation in Alberta's Tar Sands region releases on average 8.7 megatonnes of carbon dioxide into the atmosphere on a yearly basis. This is not accounted for in the government and industry's calculation of climate impacts from the Tar Sands, currently evaluated at 36 megatonnes per year.
© Greenpeace / John Woods