Compared to fats and carbs, protein spends greater amount of energy when it's processed by our digestive system. (fitnessandpower.com)
With current technology, it requires great amounts of energy to desalinate ocean water on a scale large enough to meet the needs of a whole city. (sciencebuddies.org)
Athletes need great amounts of energy in order to excel at their sport. (fitnessandpower.com)