Nowadays, because of rich technology, people neglected that we should save energy. Energy is very important, if we do not save energy, the world's resources may be used up one day. People might think: 'Oh! Who cares about energy anyway. We just need to pay and that's no big deal.!' Well, this topic seems very boring, but it only takes a minute or two to finish. After completing it, you could just continue your video game or concentrate on what you're doing. We hope you do not mind.