The biggest expense was installing the mantle ducts to keep the carbonate-silicate cycle operating.
https://explainxkcd.com/3078/
I'd think they're more like cookies, but idk I'm not really a geologist ๐
A community for a webcomic of romance, sarcasm, math, and language.
I'd think they're more like cookies, but idk I'm not really a geologist ๐