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Initiatives by topic
Education for sustainability
Sustainable transport activism
Wikipedia: List of hiking trails in Wisconsin
Towards sustainable economies
Allied Community Co-op is the first Mutual Aid Network pilot site. It’s where some of the organization’s fundamental ideas were born. Located in a food desert with little infrastructure (no school, grocery store, library, or neighborhood center), the Allied Co-op is working to bring a food buying club and a cooperatively-owned grocery store to the neighborhood.
The Social Justice Center, a multi-stakeholder nonprofit building in Madison's affluent East Side, is a convening partner in exploring Madison's second Mutual Aid Network pilot, which will be an inter-city partnership connecting Allied Co-op and many other local stakeholders in a network of resource-sharing and exchange initiative designed to create more equitable distribution of existing resources across the city. 
Walnut Way Conservation Corp, 501(c)(3) nonprofit neighborhood organization, Milwaukee
News and comment
Community-Led Commercial Hub Is Transforming Milwaukee’s Poorest Neighborhood, Nov 9 
Growing Power grows fish, veggies, and community with aquaponic farm, January 6 
Citizens data initiative
The cities of Wisconsin have been active in increasing the availability of legislative information on the internet, thereby providing for greater government transparency. Currently three of the five most populous cities in Wisconsin provide their constituents with internet-based access of all public records directly from the cities’ databases. Wisconsin cities started to make this a priority after Milwaukee began doing so, on their page, in 2001. One such city, Madison, has been named the Number 1 digital city by the Center for Digital Government in consecutive years. 
Energy Profile for Wisconsin, Economic, environmental, and energy data