QUOTE
We (Humans) account for less than 2 percent of all (global) pollution. So we can't blame anything on ourselves. One volcano eruption can produce more 'smog' as you call it, than a heavy industry can in a year.
I really dont believe this is true.. though it may be.. but even then, we made the smog stay here and not.. umm.. well.. go away..
We need.. um.. less chlorofleurocarbons or something like that.. they break down the ozone layer. Without it the ozone layer would slowly regenerate (like that guys shields -->

)
Then we need to get more electric using cars, not gas.. close down factories that get energy from nuclear sources and fossil fuels...
Build more solar energy plants.. try to somehow get energy from meat... or dirt..
(that was a bit sarcastic)
Of course if it stops me from being with my computer, im sad

If all of this is done fast, everything can be rebuilt, but the earths human population will go into a massive depression for possibly a century, it will lower the worlds population by about 2 billion (hopefully) (as long as its not me, i dont want to die)
We should continue to be in depression until the ozone layer is back to normal, though i doubt the government will do that if it does anything else i said..
Then we dont build any fossil fuel or nuclear power plants, use only electric cars, and dont kill any animals in nature, and earth will be quite a good place to live