Abstract
Information and Communications Technology (ICT) does itself produce certain environmental impacts due to, for example, consumption of electrical power to operate equipment and systems. On the other hand, ICT usage can contribute to a reduction in environmental impact due to a marked improvement in the efficiency of production, consumption and business, also that of traffic alternatives and a reduction in traffic volume. This is because ICT is considered to be the first technology that has been able to increase benefits while decreasing proportional consumption of resources and energy. ICT exploitation can readily contribute to solving global environmental issues. This paper reviews the concept of ‘Green ICT’ from the perspective that it is able to reduce the environmental impacts of a society by reducing the impact of ICT installations in telecommunication centers, datacenters, and customer offices and homes (Green of ICT). At the same time, it can also reduce the impact of a society as a whole, by providing various kinds of ICT services (Green by ICT).
