ABSTRACT
In this chapter the following topics and concepts will be discussed:
2.1 One-way traffic: no cycles
2.2 Positive feedback: moving up or down without inhibitions
2.3 Overexploitation: a gigantic footprint
2.4 Clean water: all for mankind, but still not enough
2.5 Agriculture and stock farming: excessive efficiency and yet still too low
2.6 Consequences for the natural environment
