The Climate Impact of Keystone XL? About 0.0001°C/yr

"As a climate scientist myself, I can profess to knowing the same thing that the 15 signatories know about what the impact that carbon contained in fossil fuel reserves will have on the climate. And I can (as can they) calculate how much of an effect the Keystone XL pipeline will probably have on global temperatures. For some reason (hmm?) the 15 climate scientists chose not to include that information in their letter to Congress."