Ta tashtey beg geayil 'syn RU myrane lesh tashtaghyn tuittymagh gas najooragh as tashtaghyn ooill. Ta ny smoo na 400 millioonyn thunnaghyn dy hashtaghyn geayil er enney 'syn RU. 'Sy vlein 2004, va lane ymmyd geayil yn RU (goaill stiagh cooid kionnit stiagh) mygeayrt 61 millioonyn hunnaghyn, as eh lhiggey da'n RU dy ve hene-haieagh ayns geayl er feie 6.5 bleeaney, ansherbee rere leahysyn tayrn magh roie, bee ny meainyn foast tayrn geayl magh ayns 20 bleeantyn. She caghlaays lostit lectraghys gientyn geayl-lostit gasaghey geayil keillit (GGK). She tilgey stiagh gaal as ocsygien trooid towl meainey GGK, as eh tilgey magh gas veih'n gheayl as cur y mestey gys y thalloo - foddee saase seyrey geayil lesh towseyn injil carboan. T'eh er credjal dy vel eddyr 7 billioonyn as 16 billioonyn thunnaghyn GGK ayns eaghtyryn er çheer, foddee. Er ymmyd roie geayil 'syn RU, ta ny towseyn shoh cowraghey tashtaghyn as ad abyl cour er feie 200 as 400 bleeantyn ec yn RU.