How to live a low-carbon life (如何低碳生活)
参考词汇：低碳low carbon ， 纸巾tissue ，垃圾分类sort out rubbishes ，手帕 handkerchief ， 电electricity
Thank you for your letter asking about our discussion on low carbon lifestyle. Here is something about it.
Everyone knows that we can do a lot of things in order to live a low-carbon life.
Firstly, we should save water and electricity. Secondly, we had better sort out rubbishes, which include recyclable and non-recyclable rubbishes. Thirdly, we could re-pick up our handkerchiefs, and use tissues as little as possible so we can stop more tress from cutting down. Last but not least, please try to walk if you have more free time, and ride bikes or take buses as often as possible.