They also are easy on consumers' pocketbooks, with an estimated additional cost per gallon of only 1 to 2 cents. In addition, the governor's action gives petroleum suppliers the option to market reformulated fuel, which produces fewer toxic and hydrocarbon emissions. Michigan also will initiate a public education effort to inform vehicle owners of the environmental and economic benefits of keeping vehicles well maintained. The violation of federal ozone standards stemmed in a large part from the unusually hot summer. Unburned gas fumes from vehicles react to sunlight and form ozone, a principal component of smog.
Ozone is an irritant to the lungs, and children and the elderly are especially susceptible.