The link is http://www.nytimes.com/2003/08/07/opinion/07THU4.html.
I think subscription to NYT online is free, but you can check on the website.
August 7, 2003
Keeping a Lost World Alive: A Last Remnant of Iowa's Tallgrass Prairie
By VERLYN KLINKENBORG
Erin E. Jordahl
Director, Iowa Chapter Sierra Club
3839 Merle Hay Road, Suite 280
Des Moines, IA 50310
515-277-8868
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www.iowa.sierraclub.org