Dumpsites exist throughout the developing countries present a threat to human health for the next several years; this is because most of these countries follow the practice of open dumping of solid wastes. Most of these dumping sites are uncontrolled and years old, having grown over time from small dumps to large, unmanaged waste sites. Municipal waste, which is the most common source of the waste which ends up at the dumpsites, has been shown to contain heavy metals which are leached out from the sites into the soil and water.