Here are a few examples of self-sustaining systems:
* Individuals who are financially independent and able to live comfortably without relying on others for financial support.
* Communities that are able to produce their own food, energy, and other resources, and are not dependent on outside sources for these necessities.
* **Ecosystems that are able to maintain a healthy balance of plant and animal life, and are not dependent on human intervention to survive.
Self-sustaining systems are often seen as desirable because they are resilient and can withstand external shocks and disruptions. They can also be more sustainable in the long term, as they do not rely on finite resources or external support that may not always be available.