This Tuesday, July 10, 2012 aerial photo shows a Nexen oil sands facility near Fort McMurray, Alberta, Canada. On Friday, Dec. 7, 2012, Canada approved China's biggest overseas energy

... more 

This Tuesday, July 10, 2012 aerial photo shows a Nexen oil sands facility near Fort McMurray, Alberta, Canada. On Friday, Dec. 7, 2012, Canada approved China's biggest overseas energy acquisition, a $15.1 billion takeover by state-owned CNOOC of Canadian oil and gas producer Nexen. (AP Photo/The Canadian Press, Jeff McIntosh) less