How the change works
- 01 / Public decision
Fuel standards
- 02 / Physical change
Lead removed from road gasoline
- 03 / Possible outcome
A diffuse source eliminated
Removing a toxic substance from the fuel reduces a widespread source of contamination before it reaches air, soil and people.
Research and local documents ↓What the evidence tells us
In 2021, UNEP announced the end of the use of leaded gasoline for road transport in the world, after a transition that lasted decades.
Putting the choices into practice
Prevention
The challengeCheck after dispersion
The responseRemove at the source
Perimeter
The challengeAll the uses confused together
The responseRoad gasoline
Heritage
The challengeLead assumed to be gone
The responseControlled residual contamination
The diagram compares choices and conditions for putting them into practice. Measured outcomes and their limits are discussed in the evidence.
Research and local documents ↓Conditions and limits
Historical contaminations and other uses of lead remain. The result does not imply an automatic reduction of CO₂.
Other possible benefits
Health protection and fewer new deposits in the environment.
Research and local documents
- Local project or policy documentUNEP · Era of Leaded Petrol Over ↗
Institutional documentation of the program, territory or rules mentioned.
- Local project or policy documentUS EPA · Final step in the phaseout of leaded gasoline ↗
National example of the regulatory transition for road fuels.