3. 垃圾问题怎么办?

　　母题：Many people say that we have developed into a “throw-away” culture, because we are filling up our environment with so many plastic bags and rubbish that we cannot fully dispose of. To what extent do you agree with this opinion and what measures can you recommend reducing this problem? (050806)

　　提示：这道题目应该围绕“一次性文化”产生的原因、后果和解决方法来展开。原因：对于方便、卫生的追求。后果：破坏水源、污染土地、污染空气。解决方法：三个R：reduce, reuse, recycle。

　　子题：消费品的增加会导致自然环境的破坏，原因和解决方法是什么?

　　4. 自然资源如何保护?

　　母题：Fossil fuels, such as coal, oil, natural gas, are used in many countries. But in some countries, the use of alternative sources of energy, including wind and solar power, are encouraged. Is this trend a positive or a negative development? (090530)、

　　提示：这道题目问的是新能源alternative energy的优缺点。优点：取之不尽用之不竭inexhaustible，更环保environmentally-friendly, 缺点：核能nuclear power会引发安全事故，水能hydropower会破坏生态环境upset the ecological balance, 太阳能solar power 成本太高，风能wind power会产生次声波污染infrasonic wave.

　　子题：淡水资源如何保护?是什么原因导致了石油、森林和淡水资源的紧张，如何解决?解决环境问题的最佳方法是提高石油的价格吗?(此题已被剑8收录)

　　5. 交通工具

　　母题：One long-distance flight consumes fuel which a car uses in several years’ time, but they cause the same amount of pollution. So some people think that we should discourage non-essential flights, such as tourist travel, rather than to limit the use of cars. To what extent do you agree or disagree? (060325, 080405)