Did you know that Naboo lacks molten core and plasma rich?

These plasmatic energies form underwater caverns and tunnels by erupting. And the humans and Gungans rely on the plasma power and collect, use in different ways.

Humans use plasma by extracting and refining it. And some of the reserves are traded.

However Gungans "farm" Locaps in order power their bubble city. Locaps purify plasma energies, so Gungans use Locaps to get plasma energies.

•Those vine thingies below bubble city is Locap root

Theed is built on a river bank, and it is literally floating, after the Battle of Naboo, Theed was reconstructed.

Before invasion

After invasion