[ben_w]

Sure, maths says it's fine.

Only takes a few hundred billion USD of aluminium for that ring to have a cross section of a square meter, which is enough to lower the resistance to 1 Ω.

Of course, only China actually produces enough aluminium for this, and you'd want to divide it between several cables both for redundancy and because putting 2 TW though one cable at any plausible voltage will give it a surface magnetic field strong enough to prevent most tools working on it, and the political issues are going to be huge, but on paper it's fine.