2. Nature is a kind mother and a cruel butcher. Hugo

People often treat the surrounding environment as a free commodity and spoil it at will, but don't know how to cherish it. Gan Harman

What the earth gives to all people is the essence of material, but in the end, what it gets back from people is the garbage of these materials. whitman

We should obey nature instead of forcing it. -Escuman

6. Because of our invasion of nature, we have destroyed the beauty of natural landscape, dynamic beauty and natural beauty. Norman cousins

7. If you want to live a safe life, there are five essentials: first, purify the air; Second, we must clarify drinking water; Third, we should recycle ditches; Fourth, clean the house; Fifth, there should be plenty of sunshine. -Nightingale