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April 23, 2009
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This wildfire burned 28,000 acres of Arizona forest and killed six firefighters.
This wildfire burned 28,000 acres of ponderosa pine forest in central Arizona and killed six firefighters. Increasing numbers of large wildfires and their costs, both human and natural, underscores the need to better understand their causes and consequences.
Credit: Tom Swetname, Laboratory of Tree-Ring Research, University of Arizona
Images credited to the National Science Foundation, a federal agency, are in the public domain. The images were created by employees of the United States Government as part of their official duties or prepared by contractors as "works for hire" for NSF. You may freely use NSF-credited images and, at your discretion, credit NSF with a "Courtesy: National Science Foundation" notation.
Additional information about general usage can be found in Conditions.
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Related story: Fire Is an Important and Under-Appreciated Part of Global Climate Change