FROM the air, the 100-acre Olushosun dumpsite in Ojota, Lagos looks harmless. From the ground, however, the site is a malodorous, contaminated world of its own with towering hills of waste. This landfill is the fourth largest in the world whilst retaining notoriety as Africa’s largest landfill. Garbage received at the landfill is estimated at 10,000 tonnes per day. A substantial portion of this is electronic waste from container ships.