news:13625...@sheol.org...
> :: You seem to be missing the point. One percent of insolation means
> :: you need a certain number of square miles of crop to match the
> :: world's consumption. How many square miles of nuclear reactors do
> :: you need for the same amount of energy? For that matter, how many
> :: square miles of photovoltaics, or of thermal solar collectors,
> :: do you need?
>
> : Robert Carnegie <
rja.ca...@excite.com>
> : But, biofuel from insolation goes on working for longer than most
> : industrial alternatives; it's "sustainable"
>
> And how in Bog's Blue Sky is that *relevant*?
>
> You can keep it up. Of course, you can't run all modern transport on
> it, but you can *keep* not running modern trasport on it. Yeesh.
>
> Further, solar via photovoltaics, thermal, or hypergengineered algae in
> transparent plastic piping, or even yet purely inorganic photosynthesis
> pathways in that TPP, are just as sustainable as current biofuel tech,
> and yield many tens of times the energy at the very least[1] (assuming
> your hypergengineering or inorganic photosynthesis development works
> well).
>
> Basically, biofuels are very very very very inefficient solar.
Yes, but they do produce what is very useful as a transport fuel.
It remains to be seen if the other things you can produce with
nukes or solar like hydrogen are as useful as a transport fuel.
> So inefficient that it can't be a solution,
We'll see...
> it can at best be a small nich player in a total solution.
And we will see just how small it ends up.
> Much like tidal, geothermal, or even hydro and wind.
Nothing like in fact.
> The two bits upthread, about "given sufficient energy" and
> "but it's sustainable" don't even address the basic issue.
It remains to be seen if it does become the basic issue if we
minimise the use of transport by not moving so many from
home to work and back twice a day etc because of the
difficulty with a decent transport fuel once the fossil fuels
become too expensive to use as a transport fuel anymore.
> Even further further, fission can supply current world consumption
> of energy for many thousands of years (if you use breeders, and
> thorium especially, but even just harvesting sea water uranium).
> So it's sustainable for all emperical cetatians.
Yes.
> Maybe even tide us over the 20 hears until fusion,
We'll see if that become viable anything like that quickly.
> and that lasts tens of millions of years iirc.
Yes, we may well end up with nukes used to produce a decent
transport fuel if it turns out that hydrogen isnt viable.
But its also clear that biodiesel particularly may well
be quite a viable approach as the price of fossil fuels
start to make them unviable as a transport fuel.
It remains to be seen how long that will be.
> [1] Actually, the saharan nations can stop pumping oil from under
> the sand, and build one form of solar or another on top of it,
> and sell synthetic hydrogen or methanol or whatnot... and also
> get into the "feed the grid" business, given sufficient power line
> tech advances. Build the Gibraltar Bridge or something. They
> had the monopoly on back gold,
They never did.
> now they have a good grip on the coming shiny gold of tomorrow!
> It might have a good chance to keep their economies from collapsing
> by and by.
> So basically, they should be against nuclear, for solar, for CO2
> reduction, and be pushing alternate synthetic fuels right away,
What they do in that regard is completely irrelevant to what happens.
> and selling them at highway-robbery prices on the basis of "peak
> oil is coming!" and "stop global warming!" and "you vouldn't vant
> to harm mother earth, vould you?". And then start working on that
> grid supplier option.
No one would take any notice if they did.
> Though they might get whiplash from the sudden turnabout. Heh.
Not a chance, they'd just be ignored.