How can we save electricity in our homes and school?

问题描述:

How can we save electricity in our homes and school?
(用英语)
我们怎样才能在家里和在学校里节约用电呢?

We should turn off the lights when there is no people in the livingroom.In order to save electricty,we'd better use less powerful lights.However,smaller televisions and computers are still necessary i...