Source: http://jimsbikeblog.wordpress.com/2011/09/07/where-bicycles-rule/
Here's an irony if you commute by bicycle through city streets to improve your health:A research paper says London bicycle commuters have 2.3-times more black carbon -- soot -- in their lungs than their pedestrian counterparts.Bicyclists have long assumed they might be inhaling a little urban pollution when a bus passes by or they get stuck behind a fume-belching delivery van at a stop light.Now the London-based researchers have put a number on it in a paper presented ...Source: http://www.bikingbis.com/blog/_archives/2011/9/28/4908836.html
Source: http://alisonstarnes.com/2011/09/05/paul-tetrick-grampy/
Source: http://www.teamradioshack.us/tour-de-suisse-levi-leipheimer-laughs-last/