© meliapond

The graphs below illustrate the 4 possible behaviours of exponential growth. The growth could be either population or industrial production: 

1. Continuous growth: If physical limits are very far off or are themselves growing.

2. Sigmoid growth: If signals from physical limits are instant and responded to immediately or the population limits itself without needing signals.

3. Overshoot and oscillation: Results if signals or responses are delayed and limits are unerodable or are able to recover quickly from erosion.

4. Overshoot and collapse: Results if signals or responses are delayed and limits are erodable (irreversibly degraded when exceeded).


In the case of the Earth, there is a delay between the signal of overshoot and the response, and limits are erodable. So overshoot and collapse is the mode of behaviour that is likely to result.

(Source: limitstogrowth.net)

2 years ago  -  51 notes
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