Ba cheart na ceanglais maidir le laghdú ar astaíochtaí CO2 a shloinneadh i ngraim CO2 in aghaidh tona-ciliméadar chun fóntas na bhfeithiclí tromshaothair a léiriú.
The CO2 emissions reduction requirements should be expressed in grams of CO2 per tonne kilometre to reflect the utility of the heavy-duty vehicles.