questionText: To ask the Secretary of State for Transport, what recent estimate his Department has made of the total carbon emissions produced by the railway system in the last 12 months.
answerText:  The most recent data from the Office of Rail and Road (ORR) shows that the total CO2 equivalent emissions from the railway (passenger and freight traction) from 1 April 2021 to 31 March 2022 was 2,332 kilotonnes. 
heading: Railways: Carbon Emissions