-Darwin
2. Nature is a kind loving mother and a cruel butcher.
-Hugo
3. People often treat their surroundings as a free commodity and spoil them at will without knowing to cherish them.
-Gan Haman
What it gets in return from people is the rubbish of these materials.
-Whitman
5. Instead of forcing nature, we must obey it.
-Escuman
6. As a result of our violation of nature, we have destroyed the beauty of natural landscape, natural dynamic beauty and natural beauty.
-norman cousins.