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Arctig: Mor o Blastig?
Faint o'n gwastraff plastig sy'n llygru m么r yr Arctig? Aeth Mari Huws yno i weld drosti'i hun. How much of our plastics are polluting the Arctic sea? Mari Huw goes there to find out.
Darllediad diwethaf
Maw 24 Medi 2019
18:15