Unit2. World News: Earth and Environment
To train students to recognize key words and phrases in listening
To develop students’ ability to identify significant information through listening To activate students’ knowledge about environment
To cultivate students’ ability of summarizing
Students’ listening; group discussion; teacher’s instruction
A. Warming up
blaze (n. & v) [C] (a) bright flame or fire 火焰; 火光: Dry wood makes a good blaze. 乾木燃起夺目的火焰. (b) very large (often dangerous) fire 大火; 火灾: Five people died in the blaze. 有五人死於火灾. Brazil ---- Rio de Janeiro（ former capital of Brazil）
The new city, Brasilia, replaced Rio de Janeiro as the capital of Brazil in 1960.
Desertification is the process by which a piece of land becomes dry, empty, and unsuitable for growing trees or crops on. (土壤)荒漠化, 沙漠化
----- A third of Africa is under threat of desertification.
everglade n. marshland, swamp
------- wetlands region in southern Florida大沼泽地