For me, we should save energy to protect the environment because of these below reasons. First, saving energy helps us maintain longer lifetime in the future,as energy runs living system, nothing or no one can survive without energy. In our society energy means coal, gas, electric, fuel…. In one day, we can suffer the shortage of the certain amount of energy due to overwhelmed population, extravagance of energy,.. Moreover, to reduce alarming environment pollution, we should cut down on the amount of energy used, energy is almost all things easy to burn and give off exhaust polluting many kinds of environment such as air, water, soil. Therefore, people can be affected to a greater or less degree . According to estimation in the world, every year, the number of cancer patients is increasing up to 12%. In short, I firmly commit to the notion that saving energy should be encouraged to be in practice.