The Environmental Protection Agency is planning to announce Wednesday a sweeping federal air-pollution standard limiting ground-level ozone, or smog, in the atmosphere, according to people familiar with the plan. The proposal will likely reanimate a battle between businesses and environmental groups that has been dormant for three years. In 2011, the EPA estimated that the proposed standard—set then at the toughest level the agency had yet considered—could cost utilities and other businesses as much as $90 billion a year. Mr. Obama delayed issuing it. The EPA will seek public comment on limiting ozone pollution between 65 and 70 parts per billion of ozone in the air, the people familiar with the matter said, which is in line with what an independent scientific advisory panel had recommended earlier this year. The current level, established in 2008 by the George W. Bush administration, is set at 75 parts per billion. Environmental […]