Yr Athro Emeritws Gareth Wyn Jones sy'n ateb cwestiynau mawr am effeithiau newid hinsawdd. A scientist who has warned us for years about climate change answers the big questions. Show more
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Yr Athro Emeritws Gareth Wyn Jones sy'n ateb cwestiynau mawr am effeithiau newid hinsawdd. A scientist who has warned us for years about climate change answers the big questions. Show more