Harpers magazine had an article on just this: Planet of Weeds by David Quammen http://www.botany.wisc.edu/courses/botany_422/readings/Quammen1998.pdf http://ww

Harpers magazine had an article on just this: Planet of Weeds by David Quammen http://www.botany.wisc.edu/courses/botany_422/readings/Quammen1998.pdf http://www.botany.wisc.edu/courses/botany_422/readings/Quamm...