great answer--had think think about it for a moment to realize this. and still it seems it's potential is largely unrealized--eg, i wonder what would be happen

great answer--had think think about it for a moment to realize this. and still it seems it's potential is largely unrealized--eg, i wonder what would be happen to the incidence of leading chronic disease (obesity, diabetes) if the fraction of bicycle riders went up by let's say 10%.