Do what you can to avoid air pollution.
做一切你能做的以避免空氣的污染。
Air pollution is still the most serious.
空氣污染仍然是最嚴重的。
Not all air pollution starts out as soot.
并非所有的空氣污染物一開始都是煤煙。
Air pollution call for our special concern.
空氣污染問題需要我們的特別關注。
Many a person has suffered from air pollution.
空氣污染影響了很多人。