Watch it people. Did you just exhale? You just injected a pollutant into the atmosphere. You probably all have Ebola and bad breath too.
Isn't nature wonderful? We have things called "plants" that now need air pollution. Evolution is wonderful. I'm sure plants used to breath oxygen a long time ago, but in response to man's dangerous release of pollutants (carbon dioxide) they can now survive, even thrive, on air pollution.
And besides, it was so hot this summer that I left my ice tea on the patio, and when I came back an hour later, the ice had all melted and it diluted my tea. This would not have happened a hundred years ago.