题目内容：

假设你是星光中学的李华，将参加主题为“Let’s ride bicycles”的英语演讲比赛获得。请撰写一份演讲稿。

主要内容：1.目前汽车带来的空气污染和交通堵塞问题。

2. 骑自行车的益处，如节能环保，有利健康等。

Good morning, everyone!

I’m Li Hua from Xing Guang Middle School . The topic of my speech is “Let’s ride bicycles.”

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Thank you!