Ever wondered where all of the air pollution has gone over the years?

No one knows for sure.

through the hole in the ozone layer

We've all absorbed it.

in our lungs

It stays in the air and floats around until it drifts in through your windows and lands on all your knick-knacks, and then you have to dust them off.

All the air pollution eventually gets mixed up in the rain and falls into our lakes and oceans, or drops to the ground.

I'm pretty sure it all gets sucked up into alien spacecraft that hover they earth. The carbon monoxide is actually the best fuel in the Milky Way for those amazing space ships. When I was a teenager, I was transported up to one and shown how they convert our smog into fuel. They suck up the pollution through the hole in the ozone layer and have been doing all they can to keep that hole from closing. Amazing folks, those aliens. I asked them to do something about medicare and social security but they just laughed.

Yes I have actually wondered this. I am sure that the particle matter, that is a part of pollution ,falls to the ground. The gasses may dissipate when it rains and changes temps. There are many other aspects of pollution, but it is not my profession to know what they are. I do know that it is a good thing to see other people that share the same thoughts or concerns about our only home the Earth. Lets do our part friend, and keep wondering. We may 'wonder up solutions'. Have a nice day!