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Definition: Proses o ddefnyddio dulliau technolegol i dynnu carbon deuocsid o'r atmosffer, gyda'r nod o leihau crynodiad cyffredinol y nwy yn yr aer.
Notes: Cymharer â’r term dal a storio carbon/carbon capture and storage, sy’n ymwneud ag alldynnu carbon deuocsid ar y pwynt y caiff ei gynhyrchu neu ei allyrru.
