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A comment on Building a Home Aquaponics System: The Basics. Parent comment

Re:Building a Home Aquaponics System: The Basics by IdeaHamstir on Wednesday December 20, 2017 @02:14AM (#15967654)
The vast majority of nitrogen fertilizers are produced by burning natural gas with atmospheric nitrogen to produce NH3, NH3OH and CO2.

https://en.wikipedia.org/wiki/Haber_process

I guess in a way, the natural gas extraction is a mining process.

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