Bike facts

Introduction
Bike is one of the most popular means of transoport in the world, and is the only that doesn't produce pollution.
Positive Effects:
When hoy ride a bike, you're doing sport and science says if you do sport, you will live for more years.
Also bike doesn't produce pollution, so if you go to somewhere in bike, you're reducing the pollution on the atmosphere.
Negative effects:
The process in which bike is made, produce a lot of pollution.
Conclusion:
If you want a long and healthy life, you should use the bike to transport.