Mae annog pobl i gefnu ar eu ceir a gwneud teithiau byr ar droed neu ar eu beiciau yn her fawr inni – ond her mae'n rhaid inni fynd i’r afael â hi os ydyn ni am gyrraedd ein targed ar gyfer allyriadau sero net erbyn 2050.
Getting people out of cars for short journeys and encouraging them to walk or cycle instead is a huge challenge for us, but one that has to be met if we are to reach our net zero carbon emission target by 2050.