FILE - In this Tuesday, June 28, 2011, file photo, an oil tanker is docked at the Exxon Mobile Baytown complex along the Houston Ship Channel in Baytown, Texas. Federal lawsuits against the U.S. Environmental Protection Agency will be filed claiming the agency has failed to correct Texas air pollution control permits with loopholes that make state enforcement rare. The suits, to be filed Thursday, July 20, 2017, by the nonprofit Washington, D.C.-based Environmental Integrity Project, target permits for the largest integrated petrochemical factory in the U.S., three refineries near the Houston Ship Channel including the largest petroleum refinery in the U.S. and a coal-fired power plant east of Dallas. (AP Photo/David J. Phillip, File)