The document discusses the CityPulse program which aims to increase environmental sensors in cities by 1000x to promote sustainable urban development. It details an initial experiment using smartwatches to measure ozone and noise levels which transmit data to the CityPulse platform. The platform then displays this collective sensor data and makes it available to others. Next steps discussed are expanding the platform and sensor network to more cities and data types while addressing technical, social, and economic challenges around privacy, data intelligibility, and creating an open platform for data reuse and new services.