The tumbleweed may seem like a Western icon, but actually it's
an invasive nuisance that scientists are struggling to control.
by Emilene Ostlind, May 19, 2011 Some popular ornamental garden
plants have become invasive, particularly in California. by Ilsa
Setziol, Apr 26, 2011 Climate change is threatening West Coast
cities. by Nathan Rice, Apr 17, 2011 Getting weeds out of the
national parks is an endless war that can never be won, but many
Park Service employees are willing - and happy - warriors. by
Amy Whitcomb, Oct 16, 2011 John Leland’s book, Aliens in the
Backyard, discusses both the dangers and the benefits arising
from the vast number of exotic species in North America –
including human beings Sep 05, 2005 The BLM’s plans to spray
nearly a million acres with herbicides have some
environmentalists fuming, but biologists and land managers
welcome the policy. by Eve Rickert, Jul 24, 2007 In Unnatural
Landscapes, Ceiridwin Terrill travels to four arid sites to show
how scientists fight to protect indigen