I've started learning Torah T'mimah on B'reishis and I chanced upon a really interesting connection
See TT on B'reisheet 2:6 "v'eid yaaleh min ho'oretz" citing Sukkah 11b
Note: this might be "old hat" to those who've learned Masechet Sukkah.
See TT #20 explaining that anenei kavod are "gidulo min ho'oretz" and its implication for hilchot s'chach.
Namely, that since eid is from the earth and
So therefore these Ananei Kavod are from the earth - and not from shomayim
And Therefore s'chach must be grown from the earth, too