(n.d.). Retrieved from Municipal wastewater treatment plants. http://www.ecy.wa.gov/programs/air/pdfs/wwtmt3.pdf Murray, R. (2013, March 13). Retrieved from Altgeld gardens: Turning poverty into possibility. http://news.medill.northwestern.edu/chicago/news.aspx?id=219018 (n.d.). Retrieved from People for community recovery. http://www.peopleforcommunityrecovery.org "Study Predicts Lower Price, Growing Demand For Petcoke." Oct. 2001: Power Engineering 24. [GREENR] Global Reference on the Environment, Energy, and Natural Resources. United States Environmental Protection Agency, (2011). (ILD000716852). Lake calumet cluster Retrieved from website: http://www.epa.gov/R5Super/npl/illinois/ILD000716852.html
Municipal wastewater treatment plants. (n.d.). Retrieved from http://www.ecy.wa.gov/programs/air/pdfs/wwtmt3.pdf Murray, R. (2013, March 13). Altgeld gardens: Turning poverty into possibility. Retrieved from http://news.medill.northwestern.edu/chicago/news.aspx?id=219018 People for community recovery. (n.d.). Retrieved from http://www.peopleforcommunityrecovery.org "Study Predicts Lower Price, Growing Demand For Petcoke." Power Engineering Oct. 2001: 24. Global Reference on the Environment, Energy, and Natural Resources. [GREENR] United States Environmental Protection Agency, (2011). Lake calumet cluster (ILD000716852). Retrieved from website: http://www.epa.gov/R5Super/npl/illinois/ILD000716852.html