YURI CORTEZ/AFP/Getty Images
This file photo taken on January 18, 2012 shows lorries with refuse lining up to unload at the "Bordo Poniente" garbage dump in Mexico City.
If you've traveled to Mexico City lately and landed at the airport, you probably noticed an unfortunate stench. AP Reporter Olga Rodriguez wrote about the persistent odor earlier this week and says that it "wafts from the manholes and leaves the morning air smelling fresh as a septic tank."
The unpleasant smell both bothered -- and intrigued -- Rodriguez every time she went through the airport, so she had to get to the, um, bottom of its cause.