PVC (polyvinyl chloride) and BFRs (brominated flame retardants) are toxic chemicals widely used in electronics. PVC, a type of plastic used to coat and insulate cables, contains carcinogenic and environmentally unfriendly substances and can leach toxics into landfill when disposed. BFRs, used to prevent circuit boards from igniting, are resistant to degradation and build up in animals and humans over time as it moves up the food chain. Lead, used in older CRT monitors, cadmium, used in laptop batteries and computer contacts, and mercury, used in lighting devices for flat screen displays, are also of particular concern. These chemicals can damage the brain and cause intellectual impairment, and can also harm kidneys, bones, and reproductive systems.