3Qs: Why better infrastructure could solve Rio’s water problems

The Olympic sailing com­pe­ti­tion began on Monday in Rio de Janeiro’s Gua­n­abara Bay, the site of exten­sive water pol­lu­tion that offi­cials have warned is a health risk for the ath­letes. Here, Geoff Trussell, director of Northeastern’s Marine Sci­ence Center, explains how bad the pol­lu­tion can be for the aquatic ecosystem and what needs to be done to fix the problem.