写一篇主题为（let's Ride Bicycle's）的英语演讲稿.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

Nowadays we can see thousand and thousand cars passingthough every rode every city every country. But even though cars bring us convenience,there are still a lot of horrible effects that costing the earth. Cars producegreenhouse gases increases the rate of global warming and damaged the environment.That is why now I strongly suggest we have to start ride a bicycle, i thinkbike is the greatest things that ever invented. First things first, it iseco-friendly which means not like cars it will not produce greenhouse gases canpolluting the air. The cars need fossil fuels to start the engine. Fossil fuelsare not renewable resource; therefore it is scarcity natural resources. Thereforeriding bike is saving the earth. Secondly riding bike is the second chancethat people get fit, many people work in the city do not have the leisure timeto go to the gym even if they want to. Therefore riding bike to work is a wayto exercise and get healthy.