假设你是星光中学的李华，将参加主题为"Let's Ride Bicycles"的英语演讲比赛。请撰写一份演讲稿，主要内容包括：
1．目前汽车带来的空气污染和交通堵塞等问题；
2．骑自行车的益处，如节能环保、有利健康等。
参考词汇：低碳生活（low-carbon life）；节能（energy saving）
交通堵塞（traffic jams）
注意：
1．词数：120词左右；
2．演讲稿开头和结尾已给出，请将其抄写在答题卡上且该部分不计入总词数。
Good morning, everyone,
I am Li Hua form Xingguang Middle School．The topic of my speech is "Let's Ride Bicycles"．
Thank you.
Li Hua
Good morning, everyone,
I am Li Hua form Xingguang Middle School．The topic of my speech is "Let's Ride Bicycles"．
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’m convened, 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!