The U.S. Environmental Protection Agency has awarded tens of millions of dollars worth of biofuel blending credits for this year to refiners HollyFrontier and Sinclair Oil after they argued the agency had wrongly denied them waivers from the country’s biofuels law as far back as 2014, according to two sources and public filings.  The release of the Renewable Identification Numbers, or RINs, marks the first reported instance of the EPA issuing tradable credits from previous years into the present market. It is likely to add fuel to an already fiery dispute between Big Oil and Big Corn over the future of America’s biofuel policy […]