1. Replace light bulbs with compact fluorescent lights or LEDs. 2. Turn down the thermostat 3 degrees in the winter and up 3 degrees in the summer. 3. Inflate car tires to improve gas mileage. 4. Wash and rinse clothes in cold water and line dry. 5. Walk, bike, carpool, or take public transit. Visit dupageco.org/cooldupage for more information and tips!