The D.C. Circuit Court of Appeals has reversed a Bush-era EPA rule that exempts livestock CAFOs from reporting air emissions, which could cost swine, poultry and dairy operations more than $6 million per year unless Congress acts.During the Bush administration, the EPA established a rule that exempted confined animal feeding operations (CAFOs) from reporting air pollution emissions of ammonia and hydrogen sulfide. This was based on the agency’s rationale that a federal response to the emissions was unlikely as it would usually be impractical and the CAFOs already reported to state authorities. However, the D.C. Circuit Court of Appeals vacated that rule last week as the result of a challenge by the Waterkeeper Alliance, a long-time CAFO foe...