英语教案－Senior 3 unit4 lesson15

Notes:

FACTS

1 First record of agriculture (date/place): 10,000 years ago, in Egypt, the Middle East and India.

2 Present world population: almost 6 billion

3 Farming population: 1 billion

4 66% of the world’s surface is sea.

5 11 % of the land surface can be used for

growing crops. REASONS FOR LOSS OF FARMLAND

1 It is being built on;

2 It is being lost by the actions of the wind and the rain;

3 Land is becoming too salty.

WAYS OF INCREASING FOOD PRODUCTION

1 You can increase the area by irrigation; you can build dams and water your fields; you can pump water from low-lying areas;

2 You can develop new plants which produce heavier crops;

3 You can develop new plants which grow in poor soil;

4 You can develop new plants that are less likely to be attacked by pests and diseases.

Step 6 Reference

SB Page 21, Part 4. Read the instruction and check that the Ss know what to do. Do the first two items orally with the whole class. Then let the Ss work through this exercise in pairs. Check the answers at the end. Answers:

1 about 10,000 years ago

2 1 billion people

3 how to feed a growing world population

4 the sea

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