当人们开始意识到地球上没有足够的石油时，他们要求汽车制造商生产能效更高、污染更少的汽车。
When people began to realise that there was not enough oil on the earth, they asked car makers to produce more efficient and less polluting cars.
或许此刻它并没有污染湖泊、空气或者地球上的生物，但是光污染之严重，需要大家协力解决。
It may not be polluting our lakes, our air or the Earth's living creatures, but light pollution is serious, and it needs to be addressed by everyone.
假如我是一个发明家，我会发明一个空气净化器，把各地的空气都变得清新起来，让地球没有大气污染。
If I were an inventor, I will invent a air purifier, around the air becomes pure and fresh, let the earth no atmospheric pollution.
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