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。