Stop Keystone XL why?
So, of course, we should *not* build Keystone XL, and instead have Canada export its tar sands crude to China, because China is so much more environmentally responsible than the U.S. Right.
The U.S. environmental movement needs to get over its NIMBY-ism, and understand that when it comes to atmospheric pollutants, the whole world is our backyard. Aside from the obvious benefits to our economy, the U.S. is far more capable of responsibly refining Canada tar sands crude than China.