1. subject to increasing concentrations of substances extracted from the Earth's crust. 4. resources are used fairly and efficiently in order to meet basic needs worldwide. The Natural Step for Business. Summary of the Rational Behind the TNS System Conditions System Condition Meaning Rationale 1. Stored Deposits Substances from the Earth's crust must not systematically increase in the ecosphere.
Nothing disappears and everything disperses.
Synthetic Compounds and other Societally-produced Material Substances produced by society must not systematically increase in the ecosphere. Substances must not be produced at a faster rate than that at which they can be broken down and integrated into cycles of nature or redeposited into the Earth's crust. Nothing disappears and everything disperses. The physical basis for productivity and diversity of nature must not be systematically diminished. We cannot harvest or manipulate ecosystems in such as away that productive capacity, ecosystem services, and diversity systematically diminish.