Many of us grew up being told to turn off the lights when we leave a room or to not hold the refrigerator door open while looking for a snack. While small, these and other suggestions to conserve energy are still important. Those who have taken any of the various online “ecological footprint” quizzes have learned that it would take four to ten Earths if everyone were to consume energy the way a middle-class American does. Knowing that we only have one Earth, and that most of our energy right now comes from nonrenewable, unsustainable sources, it is essential that we learn the most important ways to reduce our personal energy consumption. Small commitments add up…