Seriously… The annual increase [in carbon] from Keystone would amount to less than three-tenths of 1 percent of our total annual CO2-e emissions–0.286546 percent.
Check it out:

Even the Washington Post‘s “Wonkblog” has managed to mock hysterical environmentalist concerns over the Keystone pipeline, which supporters like Republican senators John Hoeven (N.D.) and Rob Portman (Ohio) are pushing the Senate to take up sometime this week. Christopher Ingraham, the man behind the blog (and a global warming believer), deftly analyzes what’s at stake and the amount of allegedly dangerous carbon it may ultimately unleash into the atmosphere. He then concludes: