"The National Park System gives people an opportunity to see places in a very natural state, and to explore and learn about different types of natural environments. The National Parks Conservation Association, a nonprofit advocacy group, asked us to assess the health of six park units around Lakes Michigan and Superior. We compiled and synthesized all the existing information from scientific studies and management plans about things like habitat, air quality, water quality, the status of wildlife and plants, and preservation of cultural structures and artifacts.

"Each site has unique challenges. For example, many have rare plant communities, and the parks are working hard on restoring and protecting those sensitive areas.

"It's important to get a snapshot of the state of the parks. How well are we doing in protecting natural resources? Which places need better protection? And what are the success stories in preserving places? There have been many."

—Mae Davenport