A suppliment to lecture, similiar topics in urbanization

http://www.prb.org/articles/2004/UrbanizationanEnvironmentalForcetoBereckonedWith.aspx

This article was written back in 2004 for the Population Reference Bureau (which I didn't know existed). It discusses many of the points we considered in lecture: environmental effects of urbanization, health effects, etc. So it serves as a nice supplement. An interesting reality, "while the world's population is doubling, the world's urban population is tripling." Torrey also gives an interesting look into the past century regarding human population.