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Ref.     Category          Definitions/Features           Key concept/            Source
               No.                                                        Keywords

               76    ITU           ICT spans across a number of      ICT, sustainability,   FG‐SSC‐0020
                                   application sectors that          energy, buildings,   (2013)
                                   characterize the framework of     transport, mobility,
                                   smart sustainable cities. Among   water management,
                                   others, energy, buildings, transport   waste management.
                                   and mobility, water and waste
                                   management.
               77    ITU           "A Smart Sustainable City has been   ICT, strategic    Hwang et al. (2013)
                                   defined as a 'knowledge', 'digital',   resource utilization,
                                   and 'cyber' or 'eco' city;        sustainability,
                                   representing a concept open to a   growth, services,
                                   variety of interpretations,       citizen happiness,
                                   depending on the goals set out by a  citizen wellness.
                                   Smart Sustainable City's planners.
                                   We might refer to a Smart
                                   Sustainable City as an improvement
                                   on today's city both functionally
                                   and structurally, using information
                                   and communication technology
                                   (ICT) as an infrastructure.
                                   Looking at its functions as well as
                                   its purposes, a Smart Sustainable
                                   City can perhaps be defined as "a
                                   city that strategically utilizes many
                                   smart factors such as Information
                                   and Communication Technology to
                                   increase the city's sustainable
                                   growth and strengthen city
                                   functions, while guaranteeing
                                   citizens' happiness and wellness."

               78    Magazine      Smart sustainable cities use      ICT, cost efficiency,   Cohen (2011)
                                   information and communication     energy efficiency,
                                   technologies (ICT) to be more     energy savings,
                                   intelligent and efficient in the use   quality of life,
                                   of resources, resulting in cost and   environment,
                                   energy savings, improved service   improved service
                                   delivery and quality of life, and   delivery, innovation,
                                   reduced environmental footprint –  low carbon
                                   all supporting innovation and the   economy.
                                   low‐carbon economy.

















            96                                                       ITU‐T's Technical Reports and Specifications
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