We need to save energy because nobody can live without energy. So why don’t we start to (17)__________ it in our home right now. We have many ways to save energy in our home. One of those ways is using electricity, water and gas (18)__________. We should turn off the lights in our room when we go out or in (19)__________ situations, avoid wasting water, close the kitchen stove after cooking. Besides, we should use energy- (20)__________ equipment. These help us not only save money but also work effectively. We should use the solar energy-renewable one. It also has low carbon emissions so they are considered green and environment- friendly. (21)__________, using renewable energy can reduce your electricity bills. In (22)__________ we need to save energy so that energy can’t run out of and continues to serve human’s life.