malambic

Calgary has also horribly cold winters which forces a lot of people to stay inside most of the winter. Maybe someone should do a correlation study with days/year where temperature doesn't exceed 20F (I know correlation != causation but at least it's one more hypothesis) . I personally feel depressed on days where I have to stay inside all day, and just taking a walk outside for half a hour uplifts my mood quite a bit.

Can we get a source for the $100M per kilometer figure? The NYC subway system has 373 km of tunnels, 60% of which is underground, which would translate to roughly 22 billion dollars just for the digging... that just seems way too high to me.