Assess the air quality in order to act on the well-being of the population. You can measure fine particles, air pollution or gas in the air.
Analyse the water level and quality of rivers, streams and groundwater to be alerted in case of flooding.
Monitor your consumption to counter possible water leaks, energy losses or other mechanism malfunctions.
Measure temperature, humidity, barometric pressure, solar radiation etc. outside. You can also measure the temperature of your roads to detect the onset of cold weather or manage heat islands.