[ExI] How will air travel work in a green solar economy?

[Keith Henson]

On Thu, Jul 10, 2014 at 5:00 AM,  John Clark <johnkclark at gmail.com> wrote:

snip


> There are only 2 other sources that have the potential to power our
> civilization for the next billion years:
>
> 1) Fusion reactors, but nobody is close to figuring out how to build even a
> working model much less a practical machine.
> 2) Thorium fission reactors, and we?ve known how to build them for half a
> century.

Well, it's fairly clear now much attention people pay to this list.

I have rapped for years about power satellites and the economic
connection between the cost to get parts to GEO and the cost of power.

Re fusion reactors, there is a working one at a convenient distance.

Keith