GOV.WALES uses cookies which are essential for the site to work. Non-essential cookies are also used to tailor and improve services. By continuing to use this site, you agree to our use of cookies.
Context: Gan adeiladu ar wybodaeth a thystiolaeth sy’n bodoli eisoes, byddwn yn datblygu dull rheoleiddio i alluogi atebion sy'n seiliedig ar natur o fewn dalgylchoedd i liniaru ar y llwyth ffosfforws ac i leihau'r effaith ar yr amgylchedd.