reduce waste For example, waiting until your dishwasher or washing machine are full before putting them on and only boiling as much water as you need
Er enghraifft, aros nes bod eich peiriant golchi llestri neu'ch peiriant golchi dillad yn llawn cyn eu rhoi ymlaen a dim ond berwi'r hyn o ddŵr sydd ei angen arnoch