作為一名高中學生，你將參加主題為“l(fā)et’s ride bicycles”的英語演講比賽。請撰寫一份演講稿，主要內(nèi)容包括：

1.目前汽車帶來的空氣污染和交通堵塞等問題；

2.騎自行車的益處，如節(jié)能環(huán)保、有利健康等。

參考詞匯：低碳生活（low-carbon life）；節(jié)能（energy saving）；有毒排放（poisonous emission）;交通堵塞（traffic congestion）

注意：1. 詞數(shù)100左右；2. 可以適當增加細節(jié)，以使行文連貫。

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