EPA Relaxes Clean-Air Requirements for Ethanol Fuel Plants

Plants turning corn into liquor were allowed to emit 250 tons of emissions per year before triggering clean-air regulations, while those processing corn into ethanol fuel could emit only 100 tons annually. The U.S. EPA has announced that ethanol-fuel plants will now be allowed the higher pollution level too. The new rule will not apply in urban areas that have air-quality problems. (Grist)