U.S. EPA today issued its final "tailoring" rule for greenhouse gas emissions, a contentious policy aimed at shielding small polluters from rigid Clean Air Act permitting requirements. EPA's rule "tailors" permitting programs to limit the number of facilities that would be required to obtain New Source Review and Title V operating permits based on their greenhouse gas emissions. EPA said the threshold would cover power plants, refineries and other large industrial plants while exempting smaller sources like farms, restaurants, schools and other facilities.