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任务二 了解全球气候变暖
Have you ever heard of global warming? It means the Earth is getting warmer and warmer. It is just like our planet is having a fever, which is a big challenge that humans are facing now.
But what causes global warming? The main reason is greenhouse gases. These are gases like carbon dioxide ($CO_2$) that go up into the air. They act like a blanket（毛毯）around the Earth, trapping heat from the sun. This makes the whole planet warmer over time.
Where do these greenhouse gases come from? A lot of them come from things that humans do. When we drive cars or trucks, they release carbon dioxide into the air. Factories also produce greenhouse gases. Cutting down trees means there are fewer plants to take in carbon dioxide.
Global warming is affecting our lives in many ways. First, bad weather like hurricanes, droughts, and wildfires are happening more often. Take the Australian forest fires as an example. This disaster destroyed the forests, killed many animals and caused serious air pollution. Second, people can get sick easily because many mosquitoes（蚊虫）and other insects may carry diseases and viruses in the hot weather. Besides, when the ice begins to melt, sea levels can rise and flood（淹没）places near the ocean. Millions of people will lose their homes because of the rising sea levels.
Ⅰ. 将单词与正确的解释连线。
1. challenge A. come or go up.
2. produce B. a difficult task which needs abilities and hard work.
3. disaster C. make something come out or happen.
4. rise D. an unlucky event.
Have you ever heard of global warming? It means the Earth is getting warmer and warmer. It is just like our planet is having a fever, which is a big challenge that humans are facing now.
But what causes global warming? The main reason is greenhouse gases. These are gases like carbon dioxide ($CO_2$) that go up into the air. They act like a blanket（毛毯）around the Earth, trapping heat from the sun. This makes the whole planet warmer over time.
Where do these greenhouse gases come from? A lot of them come from things that humans do. When we drive cars or trucks, they release carbon dioxide into the air. Factories also produce greenhouse gases. Cutting down trees means there are fewer plants to take in carbon dioxide.
Global warming is affecting our lives in many ways. First, bad weather like hurricanes, droughts, and wildfires are happening more often. Take the Australian forest fires as an example. This disaster destroyed the forests, killed many animals and caused serious air pollution. Second, people can get sick easily because many mosquitoes（蚊虫）and other insects may carry diseases and viruses in the hot weather. Besides, when the ice begins to melt, sea levels can rise and flood（淹没）places near the ocean. Millions of people will lose their homes because of the rising sea levels.
Ⅰ. 将单词与正确的解释连线。
1. challenge A. come or go up.
2. produce B. a difficult task which needs abilities and hard work.
3. disaster C. make something come out or happen.
4. rise D. an unlucky event.
答案
1.B 2.C 3.D 4.A
