Rio official: Water pollution targets won't be met by Olympics

Several Olympic sports federations raised fears that Rio's polluted waters could prove harmful to athletes' health. Exposure to fecal matter can cause

Authorities pledged to cut by 80 percent the flow of pollution into Guanabara Bay by the 2016 Games :: Mario Tama/Getty Images

Several Olympic sports federations raised fears that Rio's polluted waters could prove harmful to athletes' health. Exposure to fecal matter can cause Hepatitis A, dysentery, cholera other diseases.