As a young biologist and environmental scientist, I heard a lot about sustainability. In ecology, a system is said to be sustainable when it is both diverse and productive, indefinitely. A development project (also a system) is said to be sustainable if it is both diverse and productive, indefinitely, in terms of the environment, economy and human sociopolitical metrics. In fact, you can apply the concept of sustainability to any system, including financial systems. And your life, a system in and of its self. Personally, I am finding that the more I look the more I find that the various ‘types’ of sustainability generally are interrelated and by affecting one, one can affect another.