假设你是新华中学的李华，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）
注意：1. 词数：100词左右；
2. 演讲稿开头和结尾已经给出，不计入总词数。
Good morning, everyone.
I’m Li Hua from Xinhua Middle School. The topic of my speech is “Let’s Ride Bicycles”.
                                                                                    
                                                                                    
                                                                                    
                                                                                    
                                                                                    
                                                                                    
                                                                                    
                                                                       
Thank you!