If we are to succeed in tackling climate change that has to change, but it’s going to take a big effort to encourage people to consider alternatives.
Os ydym i lwyddo i fynd i’r afael â newid hinsawdd mae’n rhaid i hynny newid, ond mae’n mynd i olygu ymdrech fawr i annog pobl i ystyried dewisiadau eraill.