A slogan about preventing smog! Many are the best.

Pollution control and emission reduction, starting from me.

Synchronous breathing

* * * Action

Help to control pollution and reduce smog.

Pollution control and smog reduction

Defend the blue sky.

Pollution control and smog reduction

Give people more clear water and blue sky.

Keep the earth away from smog

Let green enter the family.

Pollution control and smog reduction depend on everyone.

The environment concerns you, me and him.