提供素材,自己组织：
首先,城市交通每况愈下.这里我想拿自己的亲身经历作为例证.五年前,我从家里开车到办公室花30分钟.一年后,我路上要花40分钟.两年后,为了准时到达工作岗位,我至少要提前1个小时从家里出发.之后,从去年开始,花1.5小时到达成为家常便饭.交通就像毛毛虫一样在蠕动!
First of all, urban traffic is getting from bad to worse. I'd like to cite my own experience as an example. Five years ago, it took me about 30 minutes to drive from home to office. One year later, I needed to spend about 40 minutes on the way. Then two years later, I had to start out from home at least 1 hour earlier in order to get to my office on good time for work. And then, since last year, it has just been too normal for me to spend about one and half hours to make it. The traffic just moves like a worm!
第二点,随着轿车数量无休止的增长,城市中的空气质量正日趋恶化.我们过去还能看到蔚蓝的天空,呼吸到新鲜的空气,但现在这成了一种奢望.汽车废气已经严重污染了空气,人们的身体受到了严重威胁.似乎已经很明确：我们人类已经犯了一个致命的错误,唯一能够弥补的便是极大地减少轿车的数量.
Second, with the ever growing number of cars, air quality in urban areas is deteriorating with each passing day. We used to see clear blue sky and breathe fresh air, but now this would be a real luxury. Car exhaust has seriously polluted the air and people's health is greatly endangered. It seems certain that we human beings have already made a fatal mistake that could only be remedied by bringing down the number of cars hugely.