One of the big ideas of the 21st century, “smart cities” promised a new world of connected, data-driven and sustainable urbanism. Pervasive digital infrastructures would monitor flows from sewage to traffic to criminal activities, providing information in real time and anticipating and preventing risks. One of the big ideas of the 21st century, “smart cities” promised a new world of connected, data-driven and sustainable urbanism. Pervasive digital infrastructures would monitor flows from sewage to traffic to criminal activities, providing information in real time and anticipating and preventing risks. Environment Phys.org – latest science and technology news stories