London to Introduce Higher Tax for Polluting Cars

Traffic on a main route into London by the towers of the financial district Canary Wharf on Oct. 28, 2013. Ben Stansall/AFP/Getty Images

LONDON—London’s emission rules are about to become stricter as older cars face a higher daily charge upon entering central London.

The mayor of London, Sadiq Khan, has called the city’s air a public health crisis and is enforcing the new rules in order to lower nitrogen oxide emissions and fine particulate matter, both of which can be toxic to human health.