Wright Thompson has an engrossing article on ESPNFC about how the celebration of the World Cup--while enjoyable--served to cover up the garbage that Rio de Janeiro has become.
Here's the link to Thompson's article. Caution: Some graphic language.
Sadly, I don't see these problems or draconian governmental measures getting cleaned up anytime soon, let alone before Rio hosts the 2016 Summer Olympics.
It's worth chewing on, and it's a chance to be profoundly grateful if you live in an area with decent sewage and clean water.