[1] Evergreen State Coll, Grad Program Environm, Olympia, WA 98505 USA
[2] Univ Louisville, Dept Geog, Louisville, KY 40292 USA
[3] Univ Louisville, Dept Geosci & Pan African Studies, Louisville, KY 40292 USA
[4] Temple Univ, Dept Geog & Urban Studies, Philadelphia, PA 19122 USA