21.   Rousseau said he would not inspect the New York course, declining to waste his energy in traffic when he could be resting.

22.   Silva and Vera kept navigating the mountain switchbacks, perspiring lightly, not wasting energy on words.

23.   Somewhere in our legs, muscles are pulling against one another, wasting energy as heat.

24.   The first dimmers used in homes were controlled by rheostats, which wasted energy at low settings because they converted unused current into heat.

25.   The most important is that they waste energy, absorbing a small fraction of the light that falls on them.

26.   They were wasting their energy because their student was not useful to them.

27.   Washing a few dishes at a time wastes energy.

28.   Wasted energy, Barry!

29.   While they try to maximize their chances by picking out the weak and older animals, they cannot afford to waste energy with half-hearted attacks.

30.   Why would lawmakers waste energy creating a new civil institution when an existing one would fit the bill nicely?