... then-cabinet minister Steven Guilbeault was dispatched to win May's vote for the budget last month, having received assurances from Carney's office that tax credits for enhanced oil recovery would not be in the budget or added to it afterwards. Enhanced oil recovery is a carbon storage technology that captures carbon dioxide from industrial emitters and injects it underground at oilfields. That increases pressure and pushes more oil out of the rock, while the carbon dioxide is trapped underground. Environmentalists, including Guilbeault, see a tax credit for enhanced oil recovery as a direct subsidy for oil production. The section of the budget addressing tax credits for carbon capture utilization and storage, often abbreviated as CCUS, said enhanced oil recovery would not be eligible for a federal subsidy. May had heard rumours that the government was going to reverse that decision. It was one of the things keeping her from supporting the budget — until Guilbeault gave her his word that would not happen ...