questionText: To ask the Secretary of State for Transport, what assessment she has made of the effectiveness of clean air zone enforcement policies.
answerText: Clean Air Zones work. Between 2019-2023, in the areas of cities that have a CAZ, NO2 concentrations have reduced by between 15% and 42%. Local authorities are responsible for the implementation and enforcement of Clean Air Zones, for example issuing Penal...
heading: Clean Air Zones: Enforcement