1. Reduce your driving. If you can stay off the road two days a week, you'll reduce greenhouse gas emissions by an average of 1,590 pounds per year. Walk, ride a bike or take the bus to school or work.

2. Replace incandescent bulbs with compact fluorescent lights. A compact fluorescent will usually last 10 times longer than a regular bulb. If every American home replaced just one light bulb with a compact fluorescent, it would save enough energy to light more than 2.5 million homes for a year and prevent enough pollution to equal the removal of 800,000 cars from the road.

3. Shop wisely for new appliances. Look for Energy Star products, which have met Environmental Protection Agency and U.S. Department of Energy guidelines for energy efficiency. In 2006, the program saved energy equivalent to taking 25 million cars off the road and saved Americans $14 billion in utility costs.

4. Maintain your car. Underinflated tires decrease fuel economy by up to 3 percent and lead to increased pollution and higher greenhouse gas emissions. Underinflation also increases tire wear.

5. Drive smarter, slow down. Driving 60 mph instead of 70 mph on the highway will save up to 4 miles per gallon. Accelerating and braking too hard can reduce fuel economy.

6. Wash clothes in cold water. About 90 percent of the energy spent washing clothes is in heating the water. Cold-water detergents will work effectively for just about everything in the hamper. Another way to save energy in your washer-dryer is to always wash full loads.

7. Let the dishwasher do the work. Don't prerinse dishes, just scrape off leftover food. Prerinsing can waste 20 gallons of heated water a day. Enzyme-based detergents will help make sure the dishes emerge spotless.

8. Put your computer to sleep. Keep your computer and its monitor in sleep mode rather than leaving them on and use 80 percent less electricity. Over the course of a year, it could have the effect of cutting carbon-dioxide emissions by up to 1,250 pounds.

9. Think twice before turning on the oven. Heating food in the microwave uses only 20 percent of the energy required by a full-sized oven.

10. Seal your home. Inexpensive foam strips and caulking can cut heating and cooling bills by 5 percent to 30 percent.

Sources: U.S. Environmental Protection Agency, Energy Star, Consumer Guide Automotive, Consumer Reports. Photo courtesy of NASA.