Redevelop Migratory Corridors and Ecosystems

Green roofs replace ecosystems that have been displaced by cities, helping rebuild habitats for birds traveling north and south.

The 2.5 acre green roof on the California Academy of Science consists of native vegetation designed as a habitat for indigenous species, including the threatened Bay Checkerspot butterfly. (California Academy of Science's fact sheets)

Mexico City’s nonprofit organization CICEANA cultivates 25 endangered native plants on its roof. (Earth Pledge, 2005)