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current | 16:27, 13 September 2007 | 923 × 505 (125 KB) | BetacommandBot | Transwiki approved by: w:en:User:Dmcdevit This image was copied from wikipedia:en. The original description was: == Summary == U.S Environmental Protection Agency in collaboration with North Carolina State University (NCSU) == Licensing == {{PD-USG |
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