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高频话题写作 ——Environment protection What caused it? Nowadays we are faced with all kinds of environmental problems, such as pollution and global warming, which have a direct influence on our health and living environments. Among all these problems, air pollution is the most serious one. As we all know, air pollution does great harm to people’s health. On the one hand, air pollution is a killer which kills about seven million people around the world each year. On the other hand, dirty air can cause some serious diseases such as lung cancer(肺癌). What’s worse, a new study by the World Health Organization shows too much air pollution can affect a person’s abilities in two areas: language and math. Considering all these bad effects, actions must be taken to reduce air pollution. First, it is strongly suggested by the government that we should choose public transportation as much as possible instead of cars. Besides, there is no doubt that planting trees truly makes a big difference to improving the air. What’s more, we are expected to make good use of clean energy that will be less harmful to the environment. Read and underline the topic sentence of each paragraph Read and underline the topic sentence of each paragraph Air pollution Being a killer. Affecting _ Choosing_ Planting trees. math and language abilities. clean energy. Read Para. 2-3 and finish the mind map. Causing _ serious diseases Using _ public transportation Para.2 Para.3 influences suggestions Nowadays we are faced with all kinds of environmental problems, such as pollution and global warming, which have a direct influence on our health and living environments. Among all these problems, air pollution is the most serious one. As we all know, air pollution does great harm to people’s health. On the one hand, air pollution is a killer which kills about seven million people around the world each year. On the other hand, dirty air can cause some serious diseases such as lung cancer(肺癌). What’s worse, a new study