OLD CAR POLLUTION PROVES WORSE THAN FORECAST

Data from Unocal Corp.'s recycled auto program, part of its southern California air pollution control program, show that pre-1971 vehicles emit more than twice as much hydrocarbons as originally forecast. That is significant for U.S. refiner/marketers, who maintain that turnover of the nation's vehicle fleet will make a major contribution to air emissions reductions and thus lessen the need for alternate fuels and other stringent air pollution control measures.

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