http://www.explorato...umanpower1.html
Cycling, being exercise, also has positive externalities - improved health and decreased pollution, resulting in reduced mortality and health care expenses.
http://ehp03.niehs.n...289/ehp.1103440
As opposed to the negative externalities associated with fossil fuel/ car dependency - health impacts, climate change, oil spills, supporting anti-democratic states and other dubious foreign policy decisions, etc.
And as for groceries, surely, grocery delivery by bicycle isn't that radical a concept, is it? In a small, dense city like Victoria, no problem!
http://www.youtube.c...d&v=OaXrOWvalqc
And some emergency services have been serviced quite well by bicycle, actually:

(the BBC series is based on the memoirs of midwife Jennifer Worth, who describes attending to patients in East London by bicycle)
Does this mean that firefighters and paramedics will soon be responding to incidents by bike? Of course not. But if you look out the window, most steel boxes on the road are not emergency vehicles, they're single drivers. Many of these folks probably could do their trips by bike. Hence the push for more bicycle trips.