In Camden, N.J., perhaps the poorest American city I regularly visit, I photograph what I call paired houses: two dwellings, side by side, one occupied, the other empty. Those living in the occupied home often have their lives made more difficult by what happens on the other side of a shared wall. If I see a neighbor or meet the resident of one of the occupied houses, I ask how they're coping. They tell me that people throw trash in the front and back yards of the vacant unit, causing foul smells and attracting rats. Physical problems in the empty shell cause accelerated decay in the occupied house. Water may be left running in the unoccupied unit, causing moisture to migrate next door. In cold weather, pipes burst. Joists rot and collapse, tearing bricks out of the shared wall. And if the empty dwelling is not properly sealed, prostitutes and drug addicts may break in and start fires.
(hat tip: Perry)