不污染环境的建筑技术 Doesn't pollute the building technology
请不要污染环境 Stop Pollution
不要被环境污染了 Do not be polluted environment ; Not to be environmental pollution
如果有种汽车燃油可以不污染环境就太好了。
It will be great if there is some kind of fuel (燃料) we can use in cars that won't produce any pollution.
我认为，首先，我们可以让汽车不污染环境。
I think, firstly, we can make cars that don't pollute the environment.
我们真的能够研究出一种不污染环境的核能源吗？
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