<P> Sustainable development is the organizing principle for meeting human development goals while at the same time sustaining the ability of natural systems to provide the natural resources and ecosystem services upon which the economy and society depend . The desirable end result is a state of society where living and conditions and resource use continue to meet human needs without undermining the integrity and stability of the natural systems . </P> <P> While the modern concept of sustainable development is derived mostly from the 1987 Brundtland Report, it is also rooted in earlier ideas about sustainable forest management and twentieth century environmental concerns . As the concept developed, it has shifted to focus more on economic development, social development and environmental protection for future generations . It has been suggested that "the term' sustainability' should be viewed as humanity's target goal of human - ecosystem equilibrium (homeostasis), while' sustainable development' refers to the holistic approach and temporal processes that lead us to the end point of sustainability". </P> <P> The concept of sustainable development has been--and still is--subject to criticism . What, exactly, is to be sustained in sustainable development? It has been argued that there is no such thing as a sustainable use of a non-renewable resource, since any positive rate of exploitation will eventually lead to the exhaustion of Earth's finite stock; this perspective renders the Industrial Revolution as a whole unsustainable . It has also been argued that the meaning of the concept has opportunistically been stretched from' conservation management' to' economic development', and that the Brundtland Report promoted nothing but a business as usual strategy for world development, with an ambiguous and insubstantial concept attached as a public relations slogan (see below). </P>

When did the idea of sustainable development began