Mae Lesley Griffiths, Ysgrifennydd y Cabinet dros yr Amgylchedd a Materion Gwledig, wedi lansio ymgynghoriad cyhoeddus i ofyn sut y gall Cymru wneud yn well o ran rheoli llygredd aer a llygredd sŵn.
A public consultation on how Wales can do better in the management of air and noise pollution has been launched by Cabinet Secretary for Environment and Rural Affairs, Lesley Griffiths.