U.S. Geological Survey
The following links are articles from the July/August 2000 issue of People Land & Water, the employee news magazine of the U.S. Department of the Interior.
Invasive plants have created biological wastelands of more than 100 million acres in the United States. An area twice the size of Delaware is lost to invasive plants each year. Exotic animals and microbes add to this silent invasion that costs the nation more than a hundred billion dollars annually in lost resources and productivity and robs America of its biological heritage. Interior scientists and land managers are counter attacking, leveraging scarce resources in myriad partnerships to develop a coordinated national strategy to fight one of the most serious ecological battles of the 21st century.