Seeking to reassure major power plant and factory owners that impending regulation of climate-altering gases will not be too burdensome, the Environmental Protection Agency emphasized on Wednesday that future permitting decisions would take cost and technical feasibility into account.
Under the Obama administration, the E.P.A. declared that gases that contribute to global warming are a danger to human health and the environment and thus must be regulated under the Clean Air Act. The agency is starting with the largest sources of such emissions — coal-burning power plants, cement factories, steel mills and oil refineries — and then will extend the regulations to smaller facilities.