Neat article exploring the "myth of the green car"
 

Found it on DIY electric car, check it out, :)

http://www.diyelectriccar.com/blogs/...green-car.html

You can replace "Cars" with anything... Because technically, bikes are exactly the same. One bike will cause less damage than another due to it's manufacturing, shipping, durability etc.

Humans are inherently harmful to the environment and should be replaced by animals. Thats pretty much the point of that article.