questionText: To ask the Secretary of State for Transport, what assessment her Department has made of the impact of excess nitrogen oxide (NOx) emissions from diesel vehicles using defeat devices on UK air quality.
answerText: The Department for Transport is the department responsible for setting and enforcing standards for NOx emissions from diesel vehicles. The Market Surveillance Unit within the Driver and Vehicle Standards Agency is undertaking a programme looking at possib...
heading: Diesel Vehicles: Nitrogen Oxides