On 23 Nov, 02:59, Erik de Castro Lopo <er...@mega-nerd.com> wrote:

> Iceland currently generates about 25% of its energy needs from
> geothermal, so it seems that this is a proven technology.

The problem with geothermal sources is that they only work
in geographic areas where the eart's crust is thin, and the
hot materials are easily accessible. Once you need to drill
very deep to get to the heat, or transport the energy over
long distances, the economy breaks down.

Rune