Computers contain toxic materials like zinc, nickel, lead, barium and chromium, which is why it’s critical to do proper computer recycling. Each of these metals occur in concentrations that are higher than the federally regulated levels. Our growing stream of e-waste is a threat to our environment. In 2005 an estimated 5.3 billion pounds of electronic waste was generated. Of this, only 9% was recycled. When we retire our computers we have four options: to recycle it, donate it, return it to the manufacturer or throw it in the trash. Most commonly, we throw it away..