KenYou travel all over the world, giving talks about the conservation of nature. Do you have any comment?

JaneYes, (1) we humans must understand that wild animals have the right to live. They need wild places. Besides, there are some kinds of living things that we must not destroy. Many drugs for human diseases come from plants and insects. When we destroy a wild area, maybe we are destroying the cure for cancer without knowing it.

KenI see.

JaneEverything in nature is connected. Plants and animals make up a whole pattern of life. If we destroy that pattern, all kinds of things can go wrong.

KenCould you say more about that?

JaneSure. One time in England, rabbits were destroying farmers' grain. The farmers killed the rabbits. (2) Then foxes didn't have enough to eat and they started killing the farmers' chickens. The farmers then killed the foxes, and rats quickly increased in number and destroyed just as much grain as the rabbits had eaten. (3) We humans are in danger of destroying our environment and ourselves along with it.