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| Date: | 05 12 1948 |
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| Description: | Elevated view of members of the audience attending a meeting sponsored by the newly incorporated Southern Wisconsin Anti-Pollution Federation. The meeting ... |
| Date: | 1966 |
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| Description: | Gaylord Nelson participates in a canoe trip down the Namekagon River in an effort to protect the river under the National Wild and Scenic Rivers Act. |
| Date: | 1967 |
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| Description: | Nelson sits in a canoe and looks out over the water around the Apostle Islands. |
| Date: | 05 1970 |
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| Description: | The front page of "The Gaylord Nelson Newsletter" announcing Earth Day 1970, with the headline: "Mass Movement Begins." |
| Date: | 04 1970 |
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| Description: | Acting on the suggestion of his mentor Senator Gaylord Nelson, Wisconsin congressman David R. Obey participated (here at a gym) at the first Earth Day even... |
| Date: | |
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| Description: | Four men of the Wisconsin's Department of Natural Resources are wearing hard hats and standing next to a truck as they look over papers. The Wisconsin DNR ... |
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