文档介绍：Learning aims 1. To learn some new words about the environment. 2. To be aware of the importance of protecting the environment. Step 1. 查出下列关于环境的词的意思 Step 2. 从下列方框中选择一个恰当的词语填空 global warming; slash and burn farming ; ecotourist , acid rain , solar energy is rain mixed with chemicals, which destroys plants and soil. scientists have proved that ________________ is caused by the larger amount of carbon dioxide existing in the air. 3. The _________________________is not a good one, which often destroys the ecosystem ofa place and makes it unfit for farming ina short time. are people who visit an area without doing any harm or damage to the ecosystem. from the sun, which is considered to be clean and environmentally friendly. Step strength, force , energy 和 power 填空 energy 主要指精力, 能量。 strength 主要指力量, 强度。 power 主要指动力, 权力, 功率, 电力。 force 主要指外力,蛮力。课后训练:完形填空( Have a go! ) How often do you change your hairstyle or ask for new dresses? You may be 21 to follow trends (潮流) in Western countries, but young people in the United States don ’t care as much a bout 22 as you do. A recent survey among high school 23 in China, Japan, South Korea and the US found that 24 teenagers care more about their appearance than young people in the US. This survey was held in 156 high schools in the four countries. More than 7,000 teenagers were 25 about their vi