ELI5: Explain Like I'm 5

European emission standards

European emission standards are laws that set limits on how much pollution cars, vans, buses, and trucks can produce when they drive. Cars, vans, buses, and trucks need to be built with special parts and engines to keep their pollution levels low. If they don't meet the standards, they aren't allowed to be sold or driven in Europe. These standards help keep the air clean and protect us and the environment from too much pollution.