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英语教案－Senior 3 unit4 lesson15

[06-21 12:27:02]   来源：http://www.77xue.com  高二英语教案   阅读：8509次
概要：Notes: a Feed the world: In 1994, Professor Pimentel of Comell University warned of the following problems in providing enough food for the world’s growing population: * By 2100 the population will be 12-15 billion, or seven times its sustainable level. * Farmers are abandoning 25 million acres each year because of soil loss or waterlogging. * The declining fertility of the soil will lower food production by 20% in the next 25 years. * Topsoil is
英语教案－Senior 3 unit4 lesson15,标签：人教版高二英语教案,高二英语教案下载,http://www.77xue.com
Notes:

a Feed the world: In 1994, Professor Pimentel of Comell University warned of the following problems in providing enough food for the world’s growing population:

* By 2100 the population will be 12-15 billion, or seven times its sustainable level.

* Farmers are abandoning 25 million acres each year because of soil loss or waterlogging.

* The declining fertility of the soil will lower food production by 20% in the next 25 years.

* Topsoil is being lost 40 times faster than it can be replaced.

* Crop losses destroyed by pests have increased four times in the last 50 years.

b It is thought that: Note the use of the passive for introducing an idea.

c For one thing: This phrase is linked to The problem is... in the previous sentence. = One reason why it is difficult to feed the world‘s population is that...

d suitable for growing crops: Point out the structure: suitable +for + -ing

e And this area is becoming smaller day by day.

= And this area is becoming smaller every day. f it is being built on = buildings are being built on the land

g pests: insects or animals that destroy plants, food, etc.

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