Check this important article by NASA's James Hansen on why Canada's mining of its tar sands must not go ahead. New York Times 10 May 2012 ahead of this weekend's magnus G8 on fossil-fuel subsidies and the need for tax greening. Petitions can be signed at Avaaz.org Hansen was writing authoritatively (and in hindsight, accurately) on climate change issues in '81. Click link above for full article.
Game Over for the Climate
By JAMES HANSEN
Published: May 9, 2012
If Canada proceeds, and we do nothing, it will be game over for the climate.
Canada’s tar sands, deposits of sand saturated with bitumen, contain twice the amount of carbon dioxide emitted by global oil use in our entire history.