Only a sketch to show someone a quick demo of an SD model – I'll probably never finish this as it leaves too many relationships unspecified

1) Primary bioresources = the food and fiber system, and

2) Secondary bioresources = organic waste that is manufactured into secondary bioproducts, e.g. soil amendments (like compost), animal feed, materials & chemicals, and energy (fuels, electricity, and CHP)

This is what I would imagine how most of the US's personal finances look: The individual has a retirement account set up or will be getting pensions upon retiring and has replaced his or her rent payment with a mortgage, which will go away after 15-30 years.

Модель основана на http://www.circularmoney.org/