§ Ms. Walley
To ask the Secretary of State for Transport what estimate has been made of the impact of the introduction of catalytic converters on total emissions of carbon dioxide from motor vehicles.
§ Mr. Chope
Catalytic converters, which are essential to meet our future air quality objectives, can lead to an increase in fuel consumption and thus CO2 emissions. But this effect will be offset by improved engine control systems which will be required to be fitted to new petrol-engined cars from the end of 1992.