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

• It can be inferred from the passage that if a person remembers a piece of information for two days, this is probably ............

• According to the passage, all of the following contributed to the spread of English around the world EXCEPT .............

• The word "derived" in line 13 is closest in meaning to ____________.

ZUNIA12

• Co-education was negatively responded to in _______.

• From the expression “on record” in line 19, it can be inferred that the tsunami that accompanied the Krakatoa volcano ___________ .

• According to the passage, writing ..............

• Why did the professor study the Brazilian students’ behaviour?

• The word "odd" is closest in meaning to ........

• What is the main point of the passage?

• Which of the following is NOT true?

• The word “urgent” in the last paragraph probably means .............

• Why was painting inside the Lascaux complex a difficult task?

• The word “they” refers to ................

• Which of the following is a kind of petal?

• Which of the following processes does the author imply was done by both men and women?

• The phrase “those forms” in the passage refers to all of the following EXCEPT ..........

• According to the passage, travel books, biographies and memoirs ______.

• Which aspect of colonial printing does the passage mainly discuss?

• The author mentions the trail pheromone of the leafcutter ant in line 11 to point out ........

• What is stated in paragraph 1 about Adler?