How green is your abode? A home energy audit, which most utility providers will do free of charge, will tell you the amount of power your household consumes and what you can do to reduce it. The average family can find ways to shave 1,000 lbs. of CO2 emissions each year. Energy auditors use special equipment like blower doors and infrared cameras to help you pinpoint exactly how your house is losing energy. You can also perform a do-it-yourself audit (see time.com/audit), but this is one time you might actually want to be audited by the experts.