This morning Mr Williams spoke passionately with Aled Hughes on his programme on Radio Cymru about our work here at Ysgol Dinas Brân as a green sustainable school.
If you would like to listen to the interview (in Welsh of course) in its entirety follow the link below (approximately 1 hour 41 into the programme - you may need to sign in to BBC i player/sounds first.
Link to Aled Hughes' programme