Richard Gilbert opens
Waste is what we have used and have no further use for. Incinerating waste, I believe, is a better environmental solution than landfilling.
Only a limited amount of waste occurs in nature. Animals produce waste in the form of faeces, which, in turn, provide nutrients for other parts of the ecosystem. In contrast, we humans appropriate and discard major material flows beyond what is required for our metabolism and beyond what our local ecosystems can handle.