London Fights Legal Challenge Over Expanding Clean-Air Zone

LONDON - London's expansion of a fiercely debated scheme that charges the most polluting vehicles in the city should be blocked, local authorities bringing a legal challenge over the plan argued on Tuesday.

The British capital's Ultra Low Emission Zone (ULEZ) levies a $16 daily charge on drivers of non-compliant vehicles, in order to tackle pollution and improve air quality.

London Mayor Sadiq Khan last yea