Do what you can to avoid air pollution.
做一切你能做的以避免空气的污染。
Air pollution is still the most serious.
空气污染仍然是最严重的。
Not all air pollution starts out as soot.
并非所有的空气污染物一开始都是煤烟。
Air pollution call for our special concern.
空气污染问题需要我们的特别关注。
Many a person has suffered from air pollution.
空气污染影响了很多人。