Advantages and 4. disadvantages ·It polluted the 5. environment. Burning these fuels contributes to air, water and soil pollution and causes acid rain.

·It wasted natural resources. We are 6. consuming fossil fuels so rapidly that they will run out in the future. ·We can depend on the alternative energy for heat, light, hot water and electricity, without 7. polluting the environment.

·It is a simple idea, which is hard to put into 8. practice. Conclusion Under no circumstances shall we develop economy at the sacrifice of 9. destroying environment - in other words, sustainable development is a 10. gift for the future. 　　

　　Ⅰ.高频单词

　　1．deposit n. 　　沉积物；存款 vt.使沉积；存钱

　　2．tentative adj. 暂定的，不确定的；犹豫不定的

　　3．adjustment n．调整，调节→adjust vt.& vi.调整，调节；适应

　　4．hopefully adv.有望；抱有希望地→hopeful adj.有希望的→hope vt. & n．希望

　　5．systematic adj.蓄意的；系统的；成体系的→system n．系统；体系

　　Ⅱ.重点短语

　　1．put_sth._into_practice　 　 实施，把......付诸实践

　　2．in_danger 处于危险中

　　3．use_up 用光；耗尽

　　4．on_top_of 除......之外；在......上面(方)

　　5．contribute to 有助于；促成

　　6．push for sth. 迫切要求，反复争取

　　7．take steps 采取措施

　　Ⅲ.经典句型

　　1．[句型展示]　This should set alarm bells ringing,_since the bare fact is that in order for everyone to survive, serious adjustments need to be made in worldwide development.

　　这应该给人们敲响警钟，因为最基本的现实是，为了让每一个人得以生存，全球发展需做出重大调整。

　　[典例背诵]　What my teacher said about planning for the future set me thinking.

　　老师所说的关于规划未来的一番话令我陷入沉思。

2．[句型展示]　One possible solution to this problem now_being_discussed is sustainable development.