Other issues, such as improving the technical efficiency of vehicles, reducing the carbon content of fuels, and reducing speed limits, were touched upon during evidence sessions but, as they are largely reserved areas, are not discussed in any detail in the report.
Cyfeiriwyd at faterion eraill, fel gwella effeithlonrwydd technegol cerbydau, lleihau maint y carbon mewn tanwyddau, a gostwng terfynau cyflymder, yn ystod sesiynau tystiolaeth ond, gan eu bod yn feysydd sydd wedi'u cadw'n ôl gan mwyaf, nid ymdrinnir â hwy'n fanwl yn yr adroddiad.Englishtainment upload Englishtainment upload