The photochemical smog as a reason to not invest in the region as the levels were too high to breathe.
There was a lot of photochemical smog and it made me a bit uneasy because I thought it could be dangerous if it got out of hand.
A lot of people in crowded cities in Asia wear protective masks because there is to much Photochemical Smog in the air and they do not want to breathe it in.