ISBN-13: 9786139585939 / Angielski / Miękka / 2018 / 52 str.
There are many modes of transportation. In this modern era, the transportation systems like road ways, rail ways, and the most costly by air i.e. airplanes, helicopters are generally used. But the cheapest among these is a bicycle which was not given that much of importance though it is cheap, fuel free, and thus Eco-friendly. If certain changes are made in bicycle such as decreasing weight, increasing efficiency it will be a great option in future.