This volume emerged as an outcome of the Assessment of Sustainability Indicators project, again implemented jointly by SCOPE and UNEP, together with the International Human Dimensions Programme on Global Environmental Change (IHDP) and the European Environment Agency (EEA), under the sponsorship of ICSU. A workshop held in Prague, Czech Republic, in May 2004 brought together thirty-five experts from seventeen countries. Three working groups—conceptual challenges, methodological frontiers, and policy relevance—built on background chapters that were written and circulated to participants before the workshop to assess selected indicators, providing cross-cutting perspectives in order to formulate a forward-looking framework for the assessment of sustainability indicators. The volume incorporates an overview and three cross-cutting chapters with others that are broadly concerned with sustainable development, including its economic, social, and environmental dimensions