Mae data newydd sy'n dangos gwir faint problem tomennydd glo Cymru wedi'u cyhoeddi heddiw wrth i Brif Weinidog Cymru wneud apêl newydd i Lywodraeth y DU fuddsoddi i ddiogelu tomennydd glo a 'helpu cymunedau sydd eisoes wedi rhoi cymaint'.
New data showing the true extent of Wales’ coal tip challenge has been published today as the First Minister of Wales makes a fresh call for the UK government to invest in coal tip safety and ‘help communities who have already given so much’.