It was originally denied by political decree. https://www.theguardian.com/environment/2015/nov/06/obama-rejects-keystone-xl-pipeline https://www.theguardian.co

It was originally denied by political decree. https://www.theguardian.com/environment/2015/nov/06/obama-rejects-keystone-xl-pipeline https://www.theguardian.com/environment/2015/nov/06/obama-re... It was political from end to end, and was never denied on fundamental grounds, but instead has been governed by protectionism. What made it particularly farcical is that at the same time Obama was pontificating about the horror's of Alberta's oil and turning an environmental new leaf, US shale oil exploration (just as bad in every dimension) was growing at a staggering pace, and is now multiples the output of Alberta's oils ands. The quicker we transition to renewables the better, but the farce of Keystone was always just politics.