A wnaiff y Gweinidog roi dadansoddiad o ôl troed carbon pob model trên sy'n cael ei ddefnyddio ar hyn o bryd gan Trafnidiaeth Cymru, gan gynnwys nifer yr unedau o bob model?
Wedi'i ateb gan Y Dirprwy Weinidog Newid Hinsawdd | Wedi'i ateb ar 25/03/2022
The total carbon footprint from TfW rolling stock for 20/21 was 63,738 tCO2e.
This was calculated based on the total gas oil consumption for the TfW fleet. (Using the Greenhouse Gas Protocol, multiplying the activity data (traction fuel consumption) by the emissions factor for red diesel). TfW do not keep data at an individual train model level.