http://www.scientificamerican.
9/8/11
What was in the World Trade Center plume? Ten years later, what exactly residents and rescue workers were exposed to remains at least a partial mystery. The question is: did all those toxicants – whether dust particles or air pollution – harm human health? Scientific American
http://www.scientificamerican. com/article.cfm?id=what-was- in-the-world-trade-center- plume
http://www.scientificamerican.