A Petersburg project is one of the finalists in Sealaska’s Path to Prosperity contest. For the second year, Petersburg’s tribe is in the running for $40,000 to grow the business of making compost.

On a hot July day on Michigan’s vehicle-free Mackinac Island, people swarm the downtown streets on foot and bikes and in horse-drawn carriages. Sitting high atop a cart emblazoned with the mission of ...