Cities, states and the federal government have created clean-air laws that restrict the amount of pollution that cars may produce. Over the years, automakers have made many refinements to car engines and fuel systems to keep up with these laws. One of these changes came about in 1975 with an interesting device called a catalytic converter. The job of the catalytic converter is to convert harmful pollutants into less harmful emissions before they ever leave the car's exhaust system.
If We Give You the Brand, Can You Name Its Most Popular Car?
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