This is probably impossible, but I have this idea that sucks pollution out of the air and puts the clean air that it also sucks up back into the atmosphere. So more clean air!! Then we would have large giant domes that would hold the pollution.
Just an idea!!
If so, what is your favorite episode? Also, why is that your favorite epsiode?
Mine is the one that has to do with the worlds largest machines or something like that, I just can't remember the actual title. But my favorite part about that episode was when they talked about the bucket...