Your carbon footprint is the amount of carbon dioxide released into the air because of your own energy needs. You need transportation, electricity, food, clothing, and other goods. Your choices can make a difference. . . . Turn off lights, TVs, [and] computers when you do not need them. Unplug! Any electronic gadget you can turn on with a remote [such as a video game or DVD player] uses power even when it is "off. " –"How can I reduce my ‘carbon footprint’?" NASA Which statement summarizes the main idea of the passage? Electronic machines should be unplugged when not in use. Electronic devices use power even when they are not being used. A carbon footprint describes a person’s use of carbon dioxide. People can decrease their carbon footprints by reducing the amount of energy they use.