What's the best way to dispose of e-waste?
Computers and peripherals are filled with hazardous waste products, so it’s essential to dispose of them properly and safely. Before doing anything with a computer you no longer want, be sure to wipe the data clean from the hard disk (deleting files is not enough). If you are not selling the equipment, be sure to work with a reputable e-waste operation.
http://www.lacitysan.org/solid_resources/special/hhw/safe_centers/