.. not unlike replacing a forest Great example: you can't (replace a forest). Whatever grows back, will be different from a previous untouched-by-humans state.

.. not unlike replacing a forest Great example: you can't (replace a forest). Whatever grows back, will be different from a previous untouched-by-humans state. Same goes for a coral reef. And species depending on it, may disappear (perhaps permanently!) along with the coral itself.