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July 23, 2016

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A truck carries leaded fueld around DuPage Airport in West Chicago, Ill., on May 9, 2014. Though not used in cars in the U.S., fuel containing lead is still used in some small, private aircraft.

Abel Uribe, Chicago Tribune / MCT

A truck carries leaded fueld around DuPage Airport in West Chicago, Ill., on May 9, 2014. Though not used in cars in the U.S., fuel containing lead is still used in some small, private aircraft.