Sewage is a large environmental problem but not for the reasons that most people think. A big reason why sewage is a problem is because of the excess hormones released in human waste. Only a small percentage of medication is absorbed into the body while the rest is expelled and finds its way to the ocean in sewage. Although wastewater treatment plants are able to remove around half of the hormones, there are still many steps that we need to take to remove the problem completely.

http://www.kisr.edu.kw/webpages/mishref/docs/rsmpis.pdf

http://www.arhp.org/publications-and-resources/contraception-journal/august-2011

http://www.health.harvard.edu/newsletters/Harvard_Health_Letter/2011/June/drugs-in-the-water

http://animals.pawnation.com/chlorination-affect-marine-life-5455.html