With acid rain, acid clouds, acid snow and acid fog we now have more and more acid floating around in the air. It is really all the same type of pollution, and in whatever guise it appears scientists call it by the general term "acid precipitation."
酸雨、酸雲、酸雪、酸霧、大氣中飄浮著愈來愈酸的空氣，其實都可算是同一種汙染，學者將這些內容相似、外形各異的酸汙染統稱為「酸性沈降」。