As every one knows ,natural energy sources are limited. So how do we do to save energy ? There are many ways to do that .First and foremost ,we can install solar panels on the house roofs which helps to save electricity from solar energy. Secondly , biogas is used instead of natural gas .We can use biogas for cooking, heating,..However ,it isn't popular with people who live in rural areas .Moreover ,it is a great idea to ride bicycle to work or to school ; go on foot because of its reducing both air pollution in big cities and coal using for cars ,buses ,motobike.Last but not least , we must turn off the lights before leaving room or when we don't need to use ;reduce clean water and so on .There are some ways to save energy .At my paint of view ,our awareness is the most important thing.If our awareness is bad at using energy ,many non-renewable sources can be disappecired.Therefore ,we must pay attention to save energy at home carefully.