Make a pledge to change a light bulb in your house and help change the world. Johnson County is one of many counties across the nation that is participating in the Change the World competition. The Change the World Campaign is an energy efficiency campaign in which counties collect pledges from residents to not only change a light in their home to an energy efficient one, but to also take other actions to save energy. Energy-saving actions could include power managing computers, choosing ENERGY STAR appliances, and properly programming home thermostats. Follow this link to take the pledge and help change the world.