Most electronic devices contain metals and other hazardous materials, which pose a significant threat to human and environmental health if mismanaged, landfilled, or incinerated.  Listed below are the materials, which pose the greatest threat from mismanaged electronic waste.

 

Lead:  Computer monitors and televisions contain the greatest amount of lead, approximately 4-6 pounds, in the form of leaded glass.  Circuit boards from electronic devices typically contain small amounts of lead in the      form of solder.

Cadmium: Most typically found in rechargeable nickel-cadmium batteries, but may also be present in plated contacts and switches, and PVC wire.

Mercury:  Most typically used in bulbs that provide energy-efficient illumination in electronics.  Currently, there is no cost-effective solution to the use of mercury in electronics.  Electronic waste is the leading source of mercury in landfills.