People pick up trash at the residence of [Getty Images]

People pick up trash at the residence of Muthurwa estate in the suburbs of Nairobi on October 10, 2010 during an exercise as part of a "Global Work Party" to combat climate change. Home to 4.5 million people, Nairobi in 2008 produced 2,400 tons of fresh waste every day. AFP PHOTO / SIMON MAINA (Photo credit should read SIMON MAINA/AFP via Getty Images)

AFP SIMON MAINA