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According to some random article[1] I duckduckgoed, agriculture is a $2.4T industry.

As a non-native speaker, I have to ask: shouldn't that be "duckduckwent"? ;)

Try DuckDuckGoosed.

Energy, Transportion and Communication are three basic necessities. Here are some more:

Food ($3-4T), Housing ($16T), Healthcare ($11T), Education (?), Clothing/Apparel ($1T)

Mining is just shy of $1T.

Start at Maslow basic needs.

Food, shelter, security, warmth (energy)