A lot of things. Multiple multiple sources from across several disciplines.

Biology as that's my expertise.
Systems
Physics
Ecology
Geology
Climate Science
Logistics
History
Chemistry
Data Science
Politics
Engineering
And more.

Like I've said before, if it had an -ology at the end of it, I've made sure I had at least a passing familiarity to it and a contact.

I'm lucky to have a large extended family in several disciplines and professions, to be able to start conversations with people, to be smart enough to ask smart questions, to know a lot of people, etc. I've developed a broader jack-of-all-trades basic knowledge base than the average 'bear' (that's an expression). At least enough to have the basics down and be able to follow along with more complicated things.

Ethics is important although it sometimes excludes practicalities.

In this case, that were likely to hit limits on things necessary for a self aware AI to exist in any meaningful sense and be more of a threat to humanity than we are to ourselves. AIs require power, copper, and data farms or information that ultimately comes from us humans.

The thing of more concern is collapse and a population bottleneck. There's a writer who goes by B, The Honest Sorcerer, here on Medium and Substack who writes about the inevitability of collapse. If you want to give yourself nightmares, forget AI, and go read him/her.

Here's one specifically about the copper problem:

https://thehonestsorcerer.medium.com/the-copper-conundrum-3b98704602c8