Written question asked by Richard Holden (Conservative) on Monday, 20 October 2025, in the House of Commons. It was due for an answer on Wednesday, 22 October 2025. It was answered by Keir Mather (Labour) on Tuesday, 28 October 2025 on behalf of the Department for Transport.

Transport: Exhaust Emissions

Question: To ask the Secretary of State for Transport, what recent estimate she has made of total transport-sector emissions since July 2024; and if she will make an assessment of how that figures compares with projections made when the Zero Emission Vehicle Mandate was introduced.

Answer: Transport was estimated to emit 111.8MtCO2e (megatonnes carbon dioxide equivalent) in 2023, with 78.1MtCO2e from cars and vans. The ZEV Mandate came into force in 2024; it requires that, by 2030, 80% of new cars and 70% of new vans should be fully zero emission. In 2024, the Government estimated that this policy would deliver 420MtCO2e of savings by 2050, averaging a reduction of 5.8MtCO2e between 2028 and 2032 and 15.8MtCO2e between 2033 and 2037. The emission savings estimates have been slightly reduced by the flexibilities announced in April but by less than 3% overall.

Secondary information

Type: Written question
Reference: 83389
Session: 2024-26
Related items: Transport: Exhaust Emissions
Wednesday, 5 November 2025
Written questions
House of Commons; Transport: Exhaust Emissions
Tuesday, 25 November 2025
Written questions
House of Commons
Subjects: Exhaust emissions Transport
Contains statistics: Yes
Link: View this Written question on www.parliament.uk