I have paid much attention on it. I always turn off the lights when I don't need them to save energy. I take good care of my things so that they can last as long as possible. I also reuse water. For example, when I finish washing the clothes, I will use the water to clean the floor. If middle school students want to reduce waste, I think they shouldn't order more food than they can finish. Besides, before they buy new things, they should think it twice to make sure it is really necessary.