[ExI] Energy options

[Keith Henson]

On Sun, Mar 13, 2011 at 5:28 PM,  Giovanni Santostasi
<gsantostasi at gmail.com> wrote:

> Hydrogen balloons would be cheaper but are they not dangerous? I
> thought we always use helium (that I know is expensive and
> increasingly rarer).
> Giovanni

When you need 5000 tons of hydrogen per GW to hold it up, helium is
not an option.

My thought is to keep at least a meter of nitrogen between the hydrogen and air.

Keith