Comments

I am incredibly disappointed in PopSci for placing Pittsburgh on this list. Clearly, none of you have ever been to the city. If you had, you would know it to be, arguably, the cleanest major city in the country. The designation as America's dirtiest city was a joke to begin with, since it was based off of ONE sensor in the city that sits downwind of the largest coke plant in North America (which, incidently, is in the process of a $1 billion dollar upgrade). Subtracting that one sensor, air quality in Pittsburgh is quite, quite good. I also love the picture they found of the city, showing conditions that frankly haven't existed in Pittsburgh in 25 years. At least the authors admitted the obvious fact that most of the pollution that is in the city is from begin (surprise!) downwind of Ohio. If you want to see what Pittsburgh really looks like, go here: http://www.lewis-clark.org/content/content-article.asp?ArticleID=2965, or here: http://pittsburgh.about.com/library/graphics/pittsburgh_2-800.jpg. Is that one of the ten dirtiest cities in the world?!