Meanwhile 56% of people who work or study in Copenhagen commute by bicycle.
I doubt they have the hills I have to contend with. I don't want to show up to work drenched in sweat.
Copenhagen: http://en-us.topographic-map.com/places/Copenhagen-8017438/
Pittsburgh, PA: http://en-us.topographic-map.com/places/Pittsburgh-800970/
San Francisco, CA: http://en-us.topographic-map.com/places/San-Francisco-92496/ (note that the entire scale of the Copenhagen map fits in the bottom 1/6 of the SF map)