Feedback loop: Feedback occurs when outputs of a system are routed back as inputs as part of a chain of cause-and-effect that forms a circuit or loop. The system can then be said to feed back into itself. We don't know all the circuits, how nature interacts with nature. Without this knowledge, we are experimenting. Destruction of feedback loops can lead to serious problems. Ecosystem services rely on feedback loops. Can we fix our problem of species loss? Be nice to planet earth, there are not many nearby planets like ours.