in santander spain the city saves taxes by using resources more efficiently with the help of sensors public spaces are only irrigated when they're too dry. garbage bins are only emptied once they're full. and helsinki garbage trucks have become obsolete waste is transferred to underground collection points without noise or pollution. in rio de janeiro a smartphone app is enabling residents to shape their surroundings the app smart favela create a 3 dimensional avatar of the shantytowns when city planners come up with new ideas these can be looked at on the app and then citizens can vote on them. and palo alto in the u.s. parking lots now have sensors. these notify citizens whenever a parking space is free the city's traffic is constantly recorded. smart robo cops are supposed to make do by safer the police robots are equipped with cameras and can find persons through facial recognition tech reports can be filed on a touchpad. and dry hole that ukraine citizens can view the incomes of civil servants and check on how politicians have voted. in the city council. city owned businesses la