More than a quarter of journeys are already made by walking and cycling, but over the next 20 years we need to increase this to over a third if we are to meet our carbon targets.
Mae dros chwarter y teithiau eisoes yn cael eu gwneud trwy gerdded a beicio, ond dros yr 20 mlynedd nesaf mae angen i ni gynyddu hyn i dros draean os ydym am gyrraedd ein targedau carbon.