Is Density in the Cards?

Do density's downsides really exist, and if they do, should we tolerate them?

I was coming home from an event in D.C. a few weeks ago, and got off my Metro train at my home station out in Fairfax County. There’s a long pedestrian walkway over VA 267, the toll road, over which the station sits.

As I walked to the exit and the parking garage, I noticed dozens of little cards strewn about on the ground. In the garage, there are these…