In the U.S., 34% of energy-related carbon dioxide emissions are from electricity generation. Many utilities now offer options to pay a little more and buy electricity from non-carbon emitting sources, like wind and solar.
Check with your electric utility to see if they offer a 100% renewable option and sign up. You may be able to offset the additional cost through simple energy-saving measures like using LED lights and turning lights and off when they aren’t being used. If your water heater is electric, consider reducing the temperature, washing laundry with cold water, and being efficient in use of your clothes dryer.