Sustainable development requires the decoupling of economic growth from environmental impacts and from the use of natural resources. This article gives an overview of existing approaches to using Information and Communication Technology (ICT) in the service of sustainability: Environmental Informatics, Green ICT, and Sustainable Human-Computer Interaction (HCI). These approaches are then discus...

Introduction Time is a pervasive element of many economic activities. As Jevons (1888, 64-65) once said: Quantity of supply must necessarily be estimated by the number of units of commodity divided by the number of units in the time over which it is to be expended. ... Consumption of commodity must have the same dimensions. For goods must be consumed in time... . Following out this course of th...

The EU has set the policy target of reducing energy use by 20% by the year 2020. Therefore, a substantial consumption decrease is needed in built environment sector. Despite the great energy efficiency improvements in households, recent energy consumption data analyses show that these targets will unlikely be reached. The general aim of this study is to point out the need to define new indicato...