Can you elaborate on the terms "stock-limited" and "flow-limited" as explained in the book?

In the context of systems thinking, "stock-limited" and "flow-limited" are terms used to describe the constraints of different types of resources. A "stock-limited" resource is one that is non-renewable, meaning its quantity is fixed, like oil or coal. Once these resources are used up, they cannot be replenished. On the other hand, a "flow-limited" resource is renewable, like solar energy or wind power. These resources are not limited by the amount available, but by the rate at which they can be replenished or generated. If a renewable resource is used faster than it can regenerate, it essentially becomes a non-renewable or "stock-limited" resource.

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The constraints imposed on a renewable vs. non-renewable system differ based on stocks and flows. For example, non-renewable resources are stock-limited whereas renewable resources are flow-limited. If you extract a resource faster than it can regenerate, it will essentially create a non-renewable system. Whaling was one of the most prominent businesses in America before scientists understood the animals' long reproductive cycles. At the time, whales appeared to be an infinite resource but proved to be quite the opposite.

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Thinking in Systems: A Primer

How do you avoid wasted time, money, and resources from short-sighted decisions? When you think in systems, you can learn to recognize the relationshi...

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