11. People should be encouraged to purchase compact cars with low emissions. 我们应该鼓励人们购买小排量的汽车。

　　12. treasure other natural resources v珍惜自然资源

　　13. There is a heated debate as to whether or not personal efforts could effectively address environmental problems. 关于是否个人努力可以解决环境污染，人们争议不断。

　　点评： address = resolve = tackle v解决……

　　14. My stand is that individual participation in greenism is definitely a worthwhile endeavor helping to protect the natural environment. 我认为， 个人在环保方面的积极参与是保护环境的一种有价值的努力。(作家立场)

　　点评：in greenism 在环境保护方面

　　拓展：To contrive and popularize cleaner cars or compact cars is definitely a worthwhile endeavor helping to protect the natural environment. 研发和普及环保汽车以及小排量汽车是保护环境的有效努力。

　　15. It works to encourage people to undertake their journey by taking public transport in terms of protecting our environment 鼓励公众乘坐公共交通工具是有效的环保方式(重点背诵)

　　点评： public transport = public transit = public transportation n公共交通工具

　　16. Meanwhile, every individual should be encouraged to partake of local organizations to oppose environmentally damaging policies or to work as the environmental protection volunteers. 同时，我们应该鼓励个人参加地方环保组织，反对有害环境的政策的出台，或者，鼓励个人做环保志愿者。

　　点评：partake of = take part in = participate in v 亲自参加……

　　17. It is highly recommended to spend more money on public transport such as buses, trams and subways. 政府应该投资公共交通工具，例如，汽车， 有轨电车，地铁等。

　　点评：环境保护政府如何作为

　　18. I re-affirm my conviction that the environmental issue is certainly relevant to each individual citizen. 我重申我的立场，环境问题和每个公民息息相关。

　　19. Co-operation and participation deriving from individual citizens have indispensable roles to play in safeguarding the natural environment. 每个公民的参与和努力在保护自然环境方面可以发挥不可缺少的作用。

　　20. Individual citizens could and should play active roles provided that we really aspire to optimize our living environment. 如果我们真的要改善我们的生存环境，个人应该也能够发挥积极的作用

　　点评：optimize our living environment v 改善我们的生存环境

　　点评：provided that = if 假如