From these graphs， we can draw a conclusion that， with the growth of human population， the number of species has decreased rapidly in America， and some species have even vanished from our planet. [图画/图表描述段]
Why does this phenomenon appear？ There are several possible reasons for this. Above all， as the human population grows rapidly， a growing number of people came to live where some wild species have been living. Then these species have to move to other places. Some of them probably can not adapt to the new environment and die. In addition， although many people look on the wildlife as their friends， some people may not think so. They catch a lot of wild animals and sell them in order to get more money. Even worse（坏）/More importantly（好）， as the result（中性）/consequence（贬义）of the industry， the natural balance and the ecologic environment are destroyed. The situation has become increasingly serious. So some of the wildlife become homeless and extinct. [原因列举段]
In order to protect the wildlife， I have some suggestions. First， the governments should make laws to prevent them from being caught and killed. Second， the governments should educate people to love nature and protect it. Third， as for ourselves， we should take practical actions to protect our living environment. [建议措施段]
注：Even worse（更糟糕的是）/More importantly（更好）， as the result（中性）/consequence（贬义）of the industry
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