Reinventing Cities, a competition launched two years ago by C40 Cities, a network of mayors focused on finding solutions to climate change, asked architects to reimagine new uses for vacant and abandoned spaces in six cities: Chicago, Madrid, Milan, Paris, Oslo, and Reykjavík. These are the winning proposals; the winning teams now have the chance to buy or lease each site to develop the projects. The designs include a new net-zero carbon housing development which has been designed for two vacant lots in Garfield Park, an underserved Chicago neighborhood. Read the full article in Fast Company.