The US banned leaded gasoline on January 1, 1996, for use in new vehicles with the passage of the Clean Air Act for road-going vehicles. But it’s still used in aircraft, racing cars, farm equipment, and marine engines.
Internationally, by the 1980s, most high-income countries had prohibited the use of leaded gasoline. Yet, as late as 2002, almost all low- and middle-income countries were still using leaded gas, which causes heart disease, stroke, and cancer.
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