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Topsoil is needed for plants, which won't grow underground without it. And if you're going to carry soil underground, might as well do it in an above ground bui
by rohit2412 8y ago
Topsoil is needed for plants, which won't grow underground without it. And if you're going to carry soil underground, might as well do it in an above ground building. Or try hydro ponics
- meggar 8y agoI was thinking more like a 10 foot wide hole, 1 mile deep.