Hi, Got into a discussion at School today about reducing energy consumption at home in order to save the planet. I asked a question that stumped my Physics teacher. If I do turn off my lights and TV when i'm not in the room surely the fossils fuel would have already been burn and the carbon dioxide therefore already released into the atmosphere? I understand that Power Stations rely heavily on predicting the electricity demand and so if we all started being more energy efficient they would start burning less fossil fuels - but my question is this... Actually turning off a light switch does that have any 'immediate' benefit to the planet? Does it really make a difference? Surely all we are doing is not using electricity that has already been produced? Thanks!