概要：, 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 wat
英语教案－Senior 3 unit4 lesson15,标签：高二英语选修7教案,高二英语下册教案,http://www.67jx.com, the
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: