Take Molly Salter and Tesni James from north Wales; while they are both gaining qualifications towards a career in net zero, they are taking very different paths.
Cymerwch Molly Salter a Tesni James o ogledd Cymru; er bod y ddwy ohonynt yn gweithio i ennill cymwysterau i’w paratoi ar gyfer gyrfa mewn sero net, maent yn dilyn llwybrau cwbl wahanol.