Sources of energy is very important. There are a lot of ways to save energy. Firstly, we have to turn off the light before going to bed. It will help us to reduceelectricity bills. Next, we should use pulic transports to reduce pollution when we go on long distances. Remember we should use low energy light bulds. I think it is a very easy way to save energy.
Nguồn đây nha :> Bận quá nên không tự viết đc =))
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