New research finds that sea levels increased at a faster rate this past century than any other in nearly 3,000 years. While this is old news to the local elected officials on the front lines of sea level rise and coastal flooding in the United States, the findings will hopefully inspire much-needed action at the federal level.

An ongoing project between WRI, the Citi Foundation and C40 works to identify global examples of sustainable urban innovation and draw out commonalities across them. Researchers Anne Maassen and Benoit Lefevre reveal four of the findings they've discovered so far.