假如你是李明，你将参加班里组织的主题为"Let's Ride Bicycles"的英语演讲比赛。请根据下面内容提示撰写一篇演讲稿，号召同学们骑车出行。
内容要点：
1.汽车的普及造成了空气污染和交通堵塞等问题；
2.骑自行车出行具有节能环保、有利健康等好处。
参考词汇：
交通堵塞（traffic jams）；节能（energy saving）；环保（environmental protection）
写作要求：
1.词数不少于80词；
2.开头已经写好，不计入总词数；
3.文中不能出现考生姓名和学校名称。

Let's Ride BicyclesDear friends，
   As we know，with the improvement of people's living standards，cars have become a popular means of transport，bringing great convenience to our life.__________

【考点】应用文；厉行节约．

【答案】I'm Li Ming．The topic of my speech is"Let's ride bicycle"．
    As is known to all，with the improvement of people's living standards，cars have become a popular means of transport，bringing great convenience to our life．However，they have also caused some problems，such as air pollution and traffic jams．
    How can we solve the problems then？As far as I am concerned，riding bicycles is a good solution．For one thing，bicycles don't need any petrol and they are energy-saving．For another，bicycles are environmentally friendly because they won't give off waste gas．What's more，riding bicycles is a good way for us to exercise and it is beneficial to our health．
    Therefore，let's take the responsibility to build up a low-carbon city by riding bicycles．Come on and join us!
Thank you!