The Amazon rainforest is home to millions of different kinds of animals, plants and birds. Most of the world’s fresh water is here and the forest plants clean the Earth’s air every day. 【小题1】 Trees are facing the risk of dying off in large numbers.

Experts continued recording data from 1991 to 2016 to examine deforestation (砍伐森林): They worked out that 75 percent of the rainforest is now at risk of being unable to recover (恢复).【小题2】

Deforestation and weather change were the main causes for the reducing of Amazon rainforest. The experts also said that the Amazon will only need a few ten years to change from rainforest into grasslands. 【小题3】

The change of the Amazon rainforest, in some ways caused by global warming will also speed up this process. 【小题4】 It would then further lead to increasing temperatures and have future effects on global average temperatures.

【小题5】 The Amazon rainforest is home to more than 30,000 kinds of plants, 2.5 million kinds of insects, 2,500 kinds of fish, more than 1,500 kinds of birds and so on. A grassland environment without a large number of plant lives would be unable to host the large ecosystem (生态系统) in the rainforest. It is likely that a large number of species would become endangered and even disappear, as they would be unable to adjust (适应) to this new ecosystem.

Would you like to adopt(收养) an animal? Although this sounds very unusual, some children have done just this. The Natural Zoo has given people the chance to adopt animals by paying for all of its food for one year. One of the animals that needed parents was a young tiger named Brocky. The people at the zoo said that it would cost about $900 a year for the food for Brocky.

Not many boys and girls have $900 to spend. That is why several hundred children and grown-ups(成年人) each have sent a little money to the zoo to help pay for Brocky’s food. Some children sent in only a quarter because that was all the money they had. Other children sent in more money than that.

Since so many people sent money to the zoo to help pay for Brocky’s food, he now will be able to eat as much as he wants. Brocky surely must be a happy tiger to know that he has so many adopted parents. Many children must also be happy to know that they have helped to feed him. It really will be thrilling(令人兴奋的) for those children to go to the Natural Zoo to visit their adopted tiger Brocky.

Some animals can be trained（训练）to help humans（人类）. For example, Pecilly trained dogs help blind people（盲人）walk around the town safely. Some kinds of monkeys can learn how to help people who can’t use their arms or legs too. The monkeys pick up the phone when it rings, carry shopping bags and do housework.

In the wild（野外）, animals and humans are not usually friends, but there are a few interesting examples where they can work together. In Africa, the honey guide birds work with humans to find food. The bird likes to eat the grubs in a beehive（蜂窝）. It knows how to find beehives but it can’t open them and get the grubs. People like to eat honey, but they aren’t very good at finding beehives, so the bird and the people help each other. The bird flies to a beehive and people follow it. When the people open the beehive and take the honey, they give the grubs to the bird.

In Laguna in the south of Brazil, fishermen and dolphins（海豚）work as a team. The ocean（海洋）isn’t very clean, so the fisherman can’t see the fish. However dolphins can find them easily by using their sounds. When the dolphins find a large group of fish, they make a noise to tell the fisherman. Then the dolphins push the fish toward（朝向）the beach. The fishermen wait in the water near beach and catch a lot of fish in their nets. The fishermen’s nets make it easier for the dolphins to catch fish too. In Laguna, fishermen and dolphins have been working for many years. The fishermen teach their children how to work with the dolphins. The dolphins must be happy to help because they teach their babies how to work with humans!