一小时内写一篇英语作文，一百词

As is known to all, cycling is a fun, healthy and economical means of traveling around the neighborhood.While people hold different opinon about riding bycicles
The advantages of bicycles mainly are as follows：Firstly,this kind of transportation is much cheaper than any other kinds that we can hardly afford. Secondly,Bicycling is also good for our environment，bicycles are 100% pollution free; lastly,it's convenient for us to go anywhere we like at any time.
Although there are so many advantages，we can't turn a blind eye to the disadvantages：the speed of cycling is low apart from its convenient. we can't be comfortable enough like we are in cars with air-condition neither when we rides bikes in summer nor in winter.What's more, we must be careful since bicycles are easy to be stolen.