Modern development with its construction of every square inch of possible space, destroys open spaces, and commons.This building is generally haphazard, occurring in cities, suburbs and exurbs. It obliterates ecosystems and habitats.The results of this development and the effects of climate change, is exemplified in the United States by the repeated flooding of cities like Ellicott, MD; Houston, TX; Miami, FL; and Wilmington, NC;and the wildfires in the West.These areas bear the brunt of the abandonment of entire towns and their economic losses.But a reverse trend is also occurring: the construction of new commons, including artificial wetlands, and urban parks, that decrease impervious land, and aid in annulling the impacts of climate change.Two examples of this phenomenon are presented.First, on the outskirts of Tel Aviv, Israel, is a reclamation of a dry riverbed, previously employed to convey raw sewage from the Palestinian territories, via Israel into the Mediterranean Sea. The second, is the construction of an artificial wetland used to treat sewage in Orlando, FL.It has become a home for numerous species and is also used for hiking trails.These reclaimed areas are then assessed utilizing Elinor Ostrom’s common-pool resources (CPR).