Aldo Leopold.

Aside from the fact that Earth Day was founded by United States Senator Gaylord Nelson from Wisconsin in 1970, lets not forgot one of Wisconsin's "favorite sons", Aldo Leopold - ecologist, forester, outdoorsman, hunter and conservationist, who spent the last 24 years of his life in western Wisconsin. Leopold founded the science of wildlife management and wrote the landmark book, A Sand County Almanac.

"A thing is right when it tends to preserve the integrity, stability and beauty of the biotic community. It is wrong when it tends otherwise."

- Aldo Leopold

Read the Milwaukee Journal Sentinel's editorial on Leopold's conservation contributions. You can find more information on the Aldo Leopold Foundation here.