By Garry Rogers
(First in series on Sonoran Desert invasive plants.)Introduction to Invasive Plants in Deserts
Invasive species, like storm troopers leading the surging ruin of global warming, are demolishing Earth's ecosystems.
Photograph: Once diverse landscape of small trees and tall Saguaro cactus was converted to impoverished shrubland after invasion by fire-prone plants.
Once they began crossing the oceans, Humans introduced thousands of…