Sustainable development is a pattern of resource use that aims to meet human needs while preserving the environment so that these needs can be met not only in the present, but also for generations to come. The term was used by the Brundtland Commission which coined what has become the most often-quoted definition of sustainable development as development that "meets the needs of the present without compromising the ability of future generations to meet their own needs.
Sustainable development ties together concern for the carrying capacity of natural systems with the social challenges facing humanity. As early as the 1970s "sustainability" was employed to describe economy equilibrium with basic ecological support systems." Ecologists have pointed to and presented the alternative of a “steady state economy” address environmental concerns.
The field of sustainable development can be conceptually broken into three constituent parts: environmental sustainability, economic sustainability, sociopolitical sustainability.
"Sustainable development is development that meets the needs of the present without compromising the ability of future generations to meet their own needs. It contains within it two key concepts:
· The concept of needs, in particular the essential needs of the world's poor, to which overriding priority should be given; and
· The idea of limitations imposed by the state of technology and social organization on the environment's ability to meet present and future needs."
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