Are people saying it's a phenomenon globally right now? That's what the BBC seems to be saying. How long til there are crackpot global warming/ozone layer crackpot "scientific" warnings?
We have "ozone alert" days herein Austin, TX, during the summer months. During those days, people are encouraged to take public transportation and leave their cars at home. A an incentive, bus rides are free(!). Supposedly, ozone fills the air and combines with auto exhausts to create smog. Maybe, I suppose. All I know is that ridership doesn't seem to go up on those days and my drive home still takes just as long.