|Bike Commuting in Chicago|
Another reason to bike or walk (besides its being fun and healthful!)
Here are some interesting numbers listing the calories burned per mile via various modes of transportation. A bike offers mechanical advantage that is unbeatable, but if one factors in the environmental cost of creating a bike versus a couple pair of shoes, perhaps the two are about even.
Calories burned directly correlates to carbon dioxide release, either from our breath while walking or biking, or from the tailpipe emissions from our vehicles. So it looks like biking or walking are nearly an order of magnitude better riding than oil burning vehicles, especially cars.