Do you know if lights out in this world. Energy help us do all kinds of things. If in your future don't have lights What do you cooks food? We can do many
things to make save the world. First , Turn of the lights and fans when you are not using them. If you not turn off. It will waste your money. Secondly , we must reuse and recycle things. Thirdly , Take a shower . That's quicker than taking a bath in a tub.