Nigerian importers are able to make a quick buck because of high local demand for electronic goods—Pentium III computers sell for about $130 and a 27-inch television will set you back around $50. The remainder, equivalent to approximately 100,000 computers per month, ends up in dumps and landfills. That electronic waste (e-waste) is chock-full of pollutants like lead, cadmium and mercury that then seep into the ground and water supply. When the mounds of waste get too high, they are burned, releasing toxins from the plastic casings into the air. (For more about how we're destroying Africa with waste, check out Travis's post, The Global Village's Septic Tank.)
Not only should African countries not allow this to happen, we shouldn't either. US manufacturers certainly have the resources to handle recycling domestically, where it would be much safer and healthier (provided they're not using prisoners!).