Fe wnaeth grŵp o bobl ifanc o gampws Coleg y Cymoedd yn y Rhondda helpu i lansio cam diweddaraf yr ymgyrch, gan sôn am brofiadau ymhlith eu ffrindiau.
A group of young people from Coleg y Cymoedd’s Rhondda campus helped launch the latest phase of the campaign, speaking about experiences among their friends.