Although there would likely be immense costs associated with this, the green foot print this would bring about would be priceless.
I would love to ride my bike to work, however with the numerous amounts of drivers who like to open their car doors without looking and the aggressive driving I see everywhere, frankly, i'm too scared. Yes, I've been skydiving, I snowboard as much as possible, and can't wait to try the skywalk at the CN tower. Toronto traffic while on a bike? No thanks.
Biking in the sky would be a dream!