Too often, historic preservation and building re-use and renovation is not part of the discussion when cities address the issues of "blight" and abandonment. Progressive cities and urbanists know that demolition alone causes vacant lots in urban neighborhoods, which itself is a blight, and a loss to the cohesive fabric of a community. Here is a balanced article which discusses the ever important issue of saving what can be saved. Because once it's gone..
Blight in Toledo