Rain forests cover less than six percent of the earth’s area, but they have 100,000 kinds of all the kinds of plants on the earth. Three-fourths of known kinds of plants and animals call the rain forest their home. Twenty percent of our different kinds of medicine comes from rain forests. The glues on an envelope and in shoes come from tropical plants. Rain forests provide materials for hundreds of other products.

Rain forests are also very important to the world’s climate. The Amazon rain forest alone receives about thirty to forty percent of the total rainfall on the earth and products about the same percentage of the world oxygen. Some scientists believe that the decreasing size of rain forests will affect the climate on the earth, making it uncomfortable or even dangerous for life.

Saving rain forests is an international problem. One country, or even a few countries, cannot solve the problem alone. The nations of the world must work together to find a solution before it is too late.

According to the passage, what must the nations of the world do to find a solution?

Câu hỏi liên quan

• What does the author say in paragraph 1 regarding most species in Earth’s history?

• The word “they” in paragraph 5 refers to .............

• Why does the author refer to Gilbert White’s book in line 2?

ZUNIA12

• According to the passage, an exuberant tone of voice may be an indication of a person’s ____________.

• The word "succeeding" is closest to ______.

• Why does the author refer to Gilbert White’s book in line 2?

• The word it in the first paragraph refers to ___.

• What does the phrase “you have got it out of your system” in passage mean?

• The word “imprisonment” in paragraph 2 is closet in meaning to _________.

• This passage is mainly about ............

• What is the main topic of the passage?

• It can be inferred from the passage that the countries which are mainly responsible for global warming are ____.

• According to the passage, the study of learning is important in many fields due to ______.

• Which of the following is the author‟s main point?

• Which of the following can result from the loss of one species in a food chain?

• The main idea of this passage is that ________.

• An example of an amphibian’s incomplete adaptation to land life is…….

• What is the last paragraph mainly about?

• Which of the following is harmful according to the passage?

• What is the main topic of the passage?