Environmental issues in Chile the highest water rates in Latin America. Nearly 90% of the water rights for hydroelectric production are owned by three companies. There are more water rights that have been issued than there are reserves in some parts of the country which has led to the drying up of groundwater resources. This shortage has particularly affected the rural and indigenous population of Chile. The mining industry has had a considerable impact on the environment of Chile. One region in particular that been significantly impacted is that of the Atacama Desert, which is considered one of the driest regions in the world.
Flora of the Sonoran Desert absent on the California side of the Colorado River. Desert Holly ("Atriplex hymenelytra") can tolerate even the hottest and driest sites. The area where two vegetation types border, overlap, and transition is called an ecotone. The ecotone between the hotter, drier Colorado Desert and that of the relatively cooler and wetter Arizona Upland occurs from Parker, Arizona southeast to near Phoenix, then south to Organ Pipe Cactus National Monument. Density of vegetation gradually diminishes moving from the Arizona Upland into the Colorado Desert proper. can be found with stems climbing through shrubs and other vegetation, producing "spectacular" floral displays on