Paraphrase the main idea(换表达)
Weave the sentences to a passage (连全文)
Scan the passage，analyse the structure （览全文,析结构,定框架）
1. What's the main idea of this passage?
2. A study showed that meat consumption is one of the main ways that humans can damage the environment.
Find out the key information,(找信息) Underline the key points(划要点) Para. 2 Then, how can eating meat have a negative effect on the environment? For a start, all farm animals such as cows, pigs, and sheep give off methane gas（沼气）by expelling（排出）wind from their bodies. One cow can produce up to 60 liters of methane each day. Methane gas is the second most common greenhouse gas after carbon dioxide. Many environmental experts now believe that it is more responsible for global warming than carbon dioxide.
pound of wheat. Onseuapcproerotifnfgardmeltaanilds used for crop
production can produce 40,000 pounds of potatoes， 30,000 pounds of carrots, or 50,000 pounds of tomatoes. However, one acre of farmland used for raising cows can produce just 250 pounds of beef．
All farm animals; give off; methane gas; is more responsible for; global warming than carbon dioxide.
Find out the key information,(找信息) Underline the key points(划要点) Para. 3 Another way that meat production affects the environment is through the use of water and land. 2,500 gallons of water are needed to produce one pound of beef while only 20 gallons of water are needed to produce one
showed that meat consumption is one of the main ways that humans can damage the environment, second only to the use of motor vehicle．
1. A vegetarian diet; health benefits; effects; the environment．
概要写作 Summary writing
Skills
How to write a summary?
Scan the passage，analyse the structure （览全文,析结构,定框架） Find out the key information,(找信息) Underline the key points(划要点) Write the main idea（连点成句，概括大意）
2. How many parts does the passage consist of and what are their functions?
Scan the passage，analyse the structure （览全文,析结构,定框架）
Hale Waihona Puke Main idea:_M_e_a_t_c_o_n_s_u_m__p_t_io_n_ is one of the main ways that humans can _d_a_m__a_g_e_ the environment.
Structure:
Part.1 Para.1
topic
Part.2
Para.2 Para.3
reasons
Part.3 Para.4
advice
Find out the key information,(找信息) Underline the key points(划要点) Para. 1
A vegetarian diet is often praised for its health benefits. Studies have shown that vegetarians usually have lower levels of heart disease and a lower risk of diabetes than people who eat meat. What most people are less aware of, however, are the effects that a vegetarian diet can have on the environment Researchers in the US recently studied henowvircoonnmsuemnte．r behavior affects the environment. The study