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May 17, 2011
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Radiation level in the oceans in 1990, mostly from nuclear weapons testing, measured in Becquerels.
Radiation level in the oceans in 1990, mostly from nuclear weapons testing, measured in Becquerels.
Credit: Woods Hole Oceanographic Institution
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: After Japan Nuclear Power Plant Disaster: How Much Radioactivity in the Oceans?