system
Given the following post, respond as if you're commenting on Reddit:
human
[Mad Max] Who makes spark plugs, batteries, alternators...etc or where do we find them?
gpt
Well it's a little from column A and a little from column B.
There are people with knowledge of mechanics and engineering (black thumbs) like Nux who know what they are looking for and could scavenge parts. There are also people from before who understand how these things were made. They could pass on this knowledge so that more could be made.