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      Proposed rule allowing E15 gas faces challenge

      Missouri lawmakers are weighing a challenge to a proposed rule that could allow greater amounts of ethanol in gasoline. A legislative committee scheduled a hearing Monday on whether the proposed rule change by the state Department of Agriculture exceeds what is allowed under state law. A 2006 Missouri law requires standard gasoline to contain 10 percent ethanol, which typically is produced from corn. The state Agriculture Department implemented that law with a rule stating the ethanol blend shall not exceed 10 percent, except in certain cases. The department is proposing to repeal that cap and instead allow a 15 percent ethanol blend to be voluntarily sold. The federal Environmental Protection Agency is fine with E15, but some automakers warn it could harm engines.