I really enjoyed Why is the charge naming convention wrong? But, in the comments at the very end, the statement that "...electrons flow in metals, but not in the ground..." left me uneasy.
I was taught that the physical process of "electron drift" was actually quite slow, and opposite in direction to "conventional current flow". So my question is, "Why do the utility companies, who use electrons as the carriers of electric current through solid metal power lines, make so many connections to metal rods driven into the ground? Don't electrons "actually" travel from one place to another? (i.e. up from out of the ground, through the grid, and back to the station?)