Sustainability is a word that is flung around willy-nilly, usually to market an idea or product, but rarely describing something that is truly sustainable. I would describe sustainable as resulting in no net loss to the environment. Keep it simple, does it cause harm or remove more than what can be replaced?…then it is not sustainable.
Here is an entertaining Ted talk that highlights an example of food production that actually produces a net gain. It could even be called “Sustainable Plus.” Even better, it is about fish! Enjoy 🙂