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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.
Ar iPlayer
鈥橠yw鈥檙 rhaglen yma ddim ar gael ar 大象传媒 iPlayer ar hyn o bryd
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