What is a simple definition for sustainability?
The simplest definition of sustainability is the mankind's ability to survive and prosper.
What is the formal definition of sustainability?
Sustainability is defined as our ability to meet the needs of the present without compromising the ability of future generations to meet their own needs.
This definition was first used by the United Nations in 1987, in the so-called Brundtland Report.
Why is it important to be sustainable?
Sustainability is perhaphs the most important concept in existence, because the only way to ensure our continued survival as a species is to be sustainable.