If you're in the market for a new computer, consider a laptop over a desktop computer, which can be a lighter and more energy-efficient choice. A laptop computer will use significantly less energy than a desktop. Newer laptops feature even bigger environmental savings, including LED-lit screens that are free of harmful mercury. Look for laptops that are Energy Star-certified and be sure to recycle your old computer wherever you buy your new one. RadioShack will even appraise the recycling value of your old PC or Mac laptop and give you a gift card for the value of it right on the spot.