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SummaryThe positive and negative environmental impacts of information and communication technology (ICT) are widely debated. This study assesses the electricity use and greenhouse gas (GHG) emissions related to the ICT and entertainment & media (E&M) sectors at sector level, including end users, and thus complements information on the product level. GHGs are studied in a life cycle perspective, but for electricity use, only the operational use is considered. The study also considers which product groups or processes are major contributors. Using available data and extrapolating existing figures to the global scale for 2007 reveals that the ICT sector produced 1.3% of global GHG emissions in 2007 and the E&M sector 1.7%. The corresponding figures for global electricity use were 3.9% and 3.2%, respectively. The results indicate that for the ICT sector, operation leads to more GHG emissions than manufacture, although impacts from the manufacture of some products are significant. For the E&M sector, operation of TVs and production of printed media are the main reasons for overall GHG emissions. TVs as well as printed media, with the estimations made here, led to more GHG emissions on a global level in 2007 than PCs (manufacture and operation). A sector study of this type provides information on a macro scale, a perspective easily lost when considering, for example, the product-related results of life cycle assessments. The macro scale is essential to capture changes in total consumption and use. However, the potential of the ICT sector to help decrease environmental impacts from other sectors was not included in the assessment.

There is a fragmented approach to social sustainability in the literature, and this paper aims at contributing to a better understanding of the meanings and interpretations of that concept whilst reviewing and discussing the social dimension of sustainability from the perspectives of two fields: urban development as well as companies and products. The analysis identifies commonalities and differences in the understanding of the conceptualization of social sustainability and helps identify core aspects which cross disciplinary boundaries. Although there are a number of similarities between the fields, compiling a list of aspects that is representative of social sustainability is not straightforward, as interpretations are context dependant and aspects are often closely interconnected. Differences are frequently due to variations in scoping and context, or whether or not a life cycle perspective is used. Nonetheless, there seems to be an underlying common understanding of what social sustainability is, and a set of key themes (social capital, human capital and well-being) is suggested as an alternative to put more specific measures and indicators in perspective. However, context specific information is still necessary in practical applications.