 | This image is a work of an Environmental Protection Agency employee, taken or made as part of that person's official duties. As works of the U.S. federal government, all EPA images are in the public domain in the United States. |  |
| This image is a work of an Environmental Protection Agency employee, taken or made as part of that person's official duties. As works of the U.S. federal government, all EPA images are in the public domain in the United States. | |