Value: future usefulness. Something that can be used by nature or humans.

Sustainable: persistence. Things survive over the long term by being net useful to their future self or offspring or the environment's value. In other words, contributing more value than consumed in resources.

This is the best Chat so far (that I have read), but as science media gets caught up in information and mathematics vs material physics, talk of economics gets caught up in energy and money rather than food and resources.

"Potatoes will get you through times of no gold better than gold will get you through times of no potatoes." -Terry Pratchett

ChatGPT is hinting at the planetary resource problem as a systemic extraction philosophy. As we think about positive solar energy, it's important that resource economics be considered in the greater context than the anthropic bias. Looking at everything from out the civilized box seems like a job for Chatty McGPT