The IHDP is supported by the United Nations and numerous international associations. While developing ways to steer industrial societies in developed/developing countries towards sustainability, the IHDP-IT group published a simplified booklet (IHDP-IT, 2001) which provided a conceptual basis, analytical tool, evaluation procedure and policy implication methods to reduce our “ecological rucksack” (hidden flows) and improve factor X and resource efficiency in corporations, regions (e.g. eco-towns) and national initiatives. Some studies have also suggested a double decoupling for sustaining resource use: economic growth from resource use (resource efficiency) and resource use from environmental impact (Bringezu, 2006).