CALGARY — Heavy polluters received a major financial boost last April when the federal government introduced a new carbon-capture tax credit, which will allow companies to write off at least 50 per cent of the cost to build new sequestration facilities. The highly anticipated program is expected to cost $7.1 billion between now and 2030. 

But oil-sands companies, for their part, are calling for more. The industry has been in negotiations with government officials for a range of additional supports that they argue will make their carbon-capture projects viable, from direct funding arrangements to market controls that would guarantee the price polluters receive when selling their carbon offsets.