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Cyfres 2
Yr Athro Siwan Davies sy'n esbonio mwy am oblygiadau'r newid hinsawdd presennol. Professor Siwan Davies looks into the effects of present climate change.
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鈥橠yw鈥檙 rhaglen yma ddim ar gael ar 麻豆官网首页入口 iPlayer ar hyn o bryd
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