Originally Posted by BillyD

Well if dodging cars wasn't enough, from today's NYTimes now we have reason to be conscious of the air we're breathing while riding.

https://www.nytimes.com/2017/07/06/w...-air.html?_r=0

Not that being concerned about the air is something we never thought of, but this gives some of us a little more to worry about . . . you know, in addition to waving, flats, BB creaks, CF explosions, and cars.