Going above 60 miles per hour lowers your gas mileage. For every five miles per hour above...

If your home was built in the last 50 years or so, you're probably surrounded by the stuff. Give it a knock and you'll hear that familiar echo. Drywall is the most commonly used interior wall finish material today-having usurped those thick, plaster and lath walls that were ubiquitous until World War II. Also called gypsum board or sheet rock, it is made of paper-typically recycled, unbleached paper-over a core of gypsum, a mineral compound. Drywall made with either recycled or synthetic gypsum is a greener choice than that made with new, mined gypsum; synthetic gypsum is made from a coal-combustion waste product, so it reduces waste, saves energy, and averts the environmental damage caused by mining.

You've found the perfect washing machine. It's sleek, it's efficient, it gets your clothes...