Green computing involves the environmentally friendly use and disposal of computers and associated equipment. The goals are to reduce hazardous materials, maximize energy efficiency, and promote recycling. Old computers should be donated to schools or charities if possible, and manufacturers will accept old monitors for recycling with new purchases. Items like monitors and CPUs contain toxic materials like mercury, cadmium, and lead if disposed of in landfills, so electronic waste must be properly recycled through organizations and programs.