The nation of Libya is making efforts to preserve Greek ruins of Cyrene along the Mediterranean coast. Apparently among the objectives of the project are to make this a carbon neutral zone. This is particularly important as this is one of the last natural landscapes along the Mediterranean with several species that cannot be found elsewhere.
This model of blending historical and environmental values and advocating for preservation might be a very good model for Detroit and other similar places that are in environmentally sensitive areas and that also have a concentration of historic resources.