Solomon Njoroge started picking waste at the Dandora dumpsite when he was a child. He's seen other waste pickers, who work long hours in the 40 acre landfill outside Nairobi, Kenya, suffer asthma, miscarriages, cancer, and respiratory diseases. A dumpsite like Dandora isn't one person's fault, but rather a literal pileup of choices made by governments, companies, and individuals, going back decades, about how to dispose of the junk and refuse no one wants and where to put...