Everyone should be aware to keep the environment healthy.

If we have to keep the environment good, then we all have to be aware. Because if we are not aware, then it is never possible to make the environment good. We ourselves make the environment dirty at different times. And that is why we have to be aware and make everyone aware. 

If we all are aware, then we can keep our environment, our city, our roads, everything good and beautiful. So it can be said that we have to play a big role in keeping the environment good. Besides, we cannot throw garbage there.