The energy consumption issue has become of paramount importance to allow a more efficient and sustainable use of resources and to avoid global warming. Though the Information and Communication Technology (ICT) sector is not one of the main contributors to energy consumption, still it accounts for over 2% of the carbon footprint. On the other hand, it is estimated that the use of ICT could enable the abatement of almost 8% of Greenhouse Gas (GHG) emissions. As the role of ICT is becoming of paramount importance in addressing better energy efficiency in the energy production and distribution sector, as well as in fostering energy-awareness in transportation, manufacturing and services, it would be odd that ICT would not apply the same concepts to itself. This double role of energy-aware, “green” ICT is the main theme of TIDWC 2013. We are looking for contributions pertaining to the application of ICT for energy-awareness in other sectors, like Smart Grids, Smart Cities, smart vehicles and transportation technologies, as well as to green computing and green networking, where the emphasis is ultimately on making ICT itself more energy-efficient.