Jonathan Barnett is a Fellow of the Penn Institute for Urban Research, Professor Emeritus of City and Regional Planning, and former director of the Urban Design Program at the University of Pennsylvania. He is the author, co-author, or editor of three previous Island Press books, and has written many other books and articles about city and regional design.
The climate, which had been relatively stable for centuries, is well into a new and dangerous phase. In 2020 there were 22 weather and climate disasters in the United States, which resulted in 262 deaths. Each disaster cost more than a billion dollars to repair. This dangerous trend is continuing with unprecedented heat waves, extended drought, extraordinary wildfire seasons, torrential downpours, and increased coastal and river flooding.
The US population is estimated to grow by more than 110 million people by 2050, and much of this growth will take place where cities and their suburbs are expanding to meet the suburbs of neighboring cities, creating continuous urban megaregions. There are now at least a dozen megaregions in the US. If current trends continue unchanged, new construction in these megaregions will put more and more stress on the natural systems that are necessary for our existence, will make highway gridlock and airline delays much worse, and will continue to attract investment away from older areas.