In President Barack Obama’s Climate Action Plan address, he stated that TransCanada’s Keystone XL tar sands pipeline would only receive State Department approval “if this project does not significantly exacerbate the problem of carbon pollution.”

As it stands, that means Keystone XL – which if built to full capacity would pipe diluted bitumen, or “dilbit” from the Alberta tar sands down to Port Arthur, TX refineries for shipment to the global export market – may likely receive Obama’s approval.