Cyclists can not spend energy on polluting motor vehicles, but could also be used to generate electricity itself 'clean', even stop. Reduce your heating expenses by using - there is no sales tax to pay. this is one of the ideas that led to two of Singapore designers to draw on paper a bicycle that produces solar and wind energy. This invention is the lynchpin of a system, known as EHITS ( 'Energy Harvesting Intermoda Transport System), which also has power stations or websites connected to the autonomous power and where bicycles are parked.

Renewable Energy: Technology, Economics and Environment by Martin Kaltschmitt, Wolfgang Streicher, and Andreas Wiese (Hardcover - Sep 10, 2007)