"After all, sustainability means running the global environment - Earth Inc. - like a corporation: with depreciation, amortization and maintenance accounts. In other words, keeping the asset whole, rather than undermining your natural capital." - Maurice Strong Sustainability is the middle ground of societal coexistence on the earth. It is the middle ground and the most efficient way to live.
This is the definition of sustainable development contained in Our Common Future, also known as the Brundtland Report, from the United Nations World Commission on Environment and Development was published in 1987