> Environmental threats to semi-arid deserts?

Environmental threats to semi-arid deserts?

Posted at: 2014-06-09 
I can't find any on the internet so can if you can please provide as many environmental threats as you can
Deserts are very sensitive biomes because they have poor soil and some plant to make some year to grow. There are many damaged have been made. Most of the common food and fiber crops and many ornamentals grown in the arid and semiarid Southwest have origins elsewhere than in the Sonoran Desert.
Basically, more salinity threatens these deserts, mostly from overgrazing, loggin...