The smog is due to invisible gases, mostly from automobile exhaust.
这种气体烟雾是由一些看不见的气体造成的，其中大部分是汽车废气。
Therefore, automobile fuel consumption and exhaust gases can be reduced. By the way, it can benefit the environment, and can prolong the life of vehicle's braking system.
另一方面，减少了汽车的废气排放，有利于环境保护：此外，还可显著提高汽车制动系零部件的使用寿命。
Therefore, automobile fuel consumption and exhaust gases can be reduced. By the way, it can benefit the environment, and can prolong the life of vehicle's braking system.
另一方面，减少了汽车的废气排放，有利于环境保护：此外，还可显著提高汽车制动系零部件的使用寿命。
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