You can do some volunteering without out degrees like with St Johns Ambulance who will give you the training to be a driver, event first aider, etc. I know a guy who volunteered as an ambulance driver who was an engineer by trade. Just as an example.

Short video here more lf a summary of the paper and what it was looking at, but not in depth analysis on it.

It is the purpose of the MOXIE unit, which they had proved a small amount from back in 2021. OG press release

Wrapping up of moxie Press release