Leaded gasoline phase-out (1970s-2021)
Countries began banning leaded gasoline in the 1970s after studies linked it to health problems. The phase-out took decades, with the last countries banning it in 2021.
Refiners switched to unleaded fuel as regulations tightened.
Global leaded gasoline use fell from near-universal to zero, showing policy can drive a complete fuel transition.
Like leaded gasoline, combustion-engine cars are being pushed out by policy. Norway shows the transition can happen faster than most predicted.
