Car exhaust emission slogans (slogans about car exhaust environmental protection)

Automobile exhaust emission slogans (slogans about automobile exhaust emission and environmental protection). Our unit is engaged in automobile exhaust emission testing. We want to place some road signs on the roadside. The location of the unit is written on the front, and the words about automobile exhaust and environmental protection are written on the back. slogan. Please help me think of some ideas! urgent! ! ! Thanks! ! !

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Fish cannot live without water, and humans cannot live without lungs. ?