The Huffington Post reports that researchers from the University of Pennsylvania released a study that found “reusable grocery bags can contain potentially harmful bacteria such as E. coli.” The study focused on San Francisco, a city that banned plastic bags beginning in late 2007. It claims that a result of that ban, and a subsequent increase in the use of reusable bags, the city saw a dramatic spike in emergency room visits and deaths related to foodborne illnesses.

http://news.yahoo.com/reusable-shopping-bags-making-us-sick-203620218.html