Caption: Housing density has increased dramatically in and around Joshua Tree National Park between 1950 and 2000. According to research by Volker Radeloff, professor of forestry at UW-Madison, this type of growth is a national trend that has many ecological implications.
Map: courtesy Volker Radeloff
Date: 2005
1950 - 300 DPI JPEG version
2000 - 300 DPI JPEG version