The Olusosun landfill sprawls across 100 acres (40ha) in Nigeria's largest city, Lagos. Initially situated at the outskirts of the city, it is now at the city's center due to urban encroachment. Olusosun is often described as Nigeria's biggest landfill; it receives over one million tons of waste annually. Most of this is electronic waste (such as lamps, televisions and laptops), municipal solid waste and construction waste.