假設你是星光中學的李華，將參加主題為"Let's Ride Bicycles"的英語演講比賽．請撰寫一份演講稿，主要內容包括：
（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）
注意：（1）詞數(shù)：120詞左右；
（2）演講稿開頭和結尾已給出，請將其抄寫在答題卡上且該部分不計入總詞數(shù)．
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 us，air pollution and heavy urban traffic are becoming increasingly severe mainly due to the overuse of cars．Therefore，it's high time we chose another better means of transport，which is cycling．
There are many good reasons to ride bicycles．First of all，compared to cars，bicycles are much cheaper to buy and maintain，and you don't have all the added costs of fuel，and parking．What's more，bicycles are more environmentally friendly than cars，because they hardly make
noises and exhaust．Cycling has become a new trend around the world，a good way of energy saving and low-carbon life．Last but not least，cycling is an excellent way to keep fit and live longer．By riding bicycles，you can cut down your risk of heart attacks，high blood pressure and
other illnesses．So I think，riding bicycles actually has great effects on us．Let's ride bicycles from today on!

As is known to us，air pollution and heavy urban traffic are becoming increasingly severe mainly due to the overuse of cars．Therefore，it's high time we chose another better means of transport，which is cycling．
There are many good reasons to ride bicycles．First of all，compared to cars，bicycles are much cheaper to buy and maintain，and you don't have all the added costs of fuel，and parking．What's more，bicycles are more environmentally friendly than cars，because they hardly make
noises and exhaust．Cycling has become a new trend around the world，a good way of energy saving and low-carbon life．Last but not least，cycling is an excellent way to keep fit and live longer．By riding bicycles，you can cut down your risk of heart attacks，high blood pressure and
other illnesses．So I think，riding bicycles actually has great effects on us．Let's ride bicycles from today on!

    Thank you!