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Before the widespread use of the term sustainable industries, the terms sustainable economy and sustainable development were prevalent. Their popularization started with the United Nations Conference for Environment and Development (the Earth Summit) in 1992. The conference was prompted by the report Our Common Future (1987, World Commission on Environment and Development, also known as the Brundtland Commission), which called for strategies to strengthen efforts to promote sustainable and environmentally sound development. A series of seven UN conferences followed on environment and development. They coined the most widely used definition of sustainable development as,
Sustainable development, according to one definition, demands that we seek ways of living, working and being that enable all people of the world to lead healthy, fulfilling, and economically secure lives without destroying the environment and without endangering the future welfare of people and the planet.
The precise meaning of sustainable development has been widely debated. For example, two years after the Brundtland Commission's Report popularised the term, over 140 definitions of sustainable development had been catalogued.
The United Nations Environment Programme position is:
Many people reject the term sustainable development as an overall term in favor of sustainability, and reserve sustainable development only for specific development activities such as energy development: the former being the process by which we can achieve the latter.
Sustainable development is one of the issues addressed by international environmental law.