Action: Follow the Speed Limit

Why It’s Worth It: It may be tempting to drive 75 miles an hour, but sticking to the 65-mile-per-hour speed limit improves fuel economy by almost 15 percent. That will reduce your car’s emissions and help you save about $200 at the pump.
Your One-Year Effect: 1,500 pounds of CO2 saved.
The Effect If Everyone in the U.S. Did It For One Year: Equal to 28,121,158 cars taken off the road for one year.

Action: Use Power Strips

Why It’s Worth It: Is your TV turned off? Think again. A percentage of your home’s electricity goes to devices that are not in use but are plugged in. To kill the current and lower your bill, plug them into a power strip and flip the switch.
Your One-Year Effect: 1,608 pounds of CO2 saved.
The Effect If Everyone in the U.S. Did It For One Year: Equal to 15,280,342 cars taken off the road for one year.

Action: Drive a Hybrid Electric Car

Why It’s Worth It: The most fuel-efficient midsize hybrid gets a combined mileage of 46 miles a gallon; a typical midsize car gets 25 miles a gallon. By not using as much gas, you’re saving 4 1/2 barrels of oil a year, plus about $560.
Your One-Year Effect: 3,660 pounds of CO2 saved.
The Effect If Everyone in the U.S. Did It For One Year: Equal to 68,615,626 cars taken off the road for a year.

Action: Buy Green Power

Why It’s Worth It: More than 50 percent of retail customers in the United States have an option of buying a green-power product from their utility. Find out if you have this option at www.epa.gov/greenpower.
Your One-Year Effect: 20,508 pounds of CO2 saved.
The Effect If Everyone in the U.S. Did It For One Year: Equal to 194,881,372 cars taken off the road for one year.