✔ 最佳答案
We all want to live in a clean and nice environment. However, it has been polluted by human beings and the earth has been destroyed a lot. We can hardly enjoy sightseeing in our countryside. Birds will not sing. Flowers will wither. There will be very few trees on the mountains and rivers will no longer be clean and clear. Can we notice that? We must love the earth otherwise we will cry for it and one day people will pay much for what they have done. Let us consider that if every day we do not waste all kinds of energies, the electrical companies will not generate too much electric charge for us. The air will not be polluted by the smoke from the electrical companies.Eventually we can save different sources of power such as fuels. and there will be a lot of trees on the mountains. The sky will be blue with moving clouds. Then the world will be full of joy.