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buom yn gweithio ar y cyd ers cryn amser gyda thrawsdoriad eang yng nghymru i ddatblygu'r cynllun hwn
we have been working together for some time with a wide cross-section of wales to develop this plan
gwrthwynebir ffermydd gwynt ar y tir ers cryn amser , ac mae llawer o wrthwynebwyr wedi awgrymu y dylid eu lleoli ar y môr
onshore windfarms have been opposed for some time , and many opponents have suggested that they should be located offshore