Ecological Regions of the U.S.-Mexico Border

This map depicts ecological regions around the United States and Mexico border. This map can be found on the USGS website at: http://borderhealth.cr.usgs.gov/maps/Ecoregions.pdf.
Six different ecological regions and eight different environmental health zones are depicted on this map. The environmental health regions are smaller than the ecological regions. The Chihuahuan Desert is the biggest ecological region on the map shown in green. The two largest environmental health areas are number five and six, which are both part of the Chihuahuan Desert. An interesting point to take away from this map is that these ecological regions are shared by both the United States and Mexico, making it essential for both countries to be aware of these areas and any areas of concern, including environmental health regions, shared between the two countries. Another interesting point of the map is that roughly half of the environmental health regions are in the United States and the other half are in Mexico. However, for the ecological regions, more of the land is in Mexico, especially the Chihuahuan Desert. The United States-Mexico border is important in terms of geography and ecology.