As we have known, energy is very necessary to our life, but it is limited, so we have to save energy. There are many kinds of energy, such as solar energy, wind energy, water energy, etc. Nowadays, Solar energy is a very popular energy, it is used a lot. It is a kind of energy, which comes from the energy of the Sun. Solar energy is a very important energy, which can be used instead of other energies. However, we should still save energy, with the following solutions. First, turn off all the electronic devices when don't use. Second, use recycled energies. If we know how to save energy, we can save money, because energy becomes more and more expensive. Widely, we can save the earth. In conclusion, it is necessary to save energy.
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       Energy is very important for our life,it helps our living become better and more convenient. Without energy,we can't live because we use energy for everything:cooking,heating,etc. So we must save and use energy effetively.Firstly, enegy is coal,oil,wind,nuclear,gas,... We use oil to provide fuel for motorbike or cars, gas for cooking and heating.They all have advantages and disadvantages. Some of them are renewable but dangerous,others are limited but safe,... However,we still should save energy by  using biogas for cooking at home, a hand fan to keep cool in summer,take a shower instead of baths,...Secondly,be a student, I should turn of all the lights when leaving rooms or going to bed,use only as much water as I need,encourge my friends go to school on foot or cycling,..Thirdly, I hope in the future,we will use solar and wind energy. Because these alternative enegy can solve the problem of the energy shortage and offer abudant amounts of clean ,safe electricity.