Energy plays an important role in our life, but now it is decreased more and more. Therefore, we should save energy.
There are many ways to save energy. Firstly, we should turn off all the appliances when you leave the room. Secondly, you ought to use the shower instead of the bath to save hydro. The other way is to walk or go by bike in short trips.
Energy is very necessary, so saving energy is saving our life!