Ogwira ntchito ya oxygen ndi chida chomwe chimayang'ana mpweya kuchokera ku mpweya wozungulira (mpweya wabwino kwambiri) pochotsa nayitrogeni kupatsa mpweya wamafuta opatsa mpweya. Olemba athu a oxygen akhoza kukhala ndi ntchito yazachipatala kapena yakunyumba.