Re:
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Pete C. wrote:
1. I don't assume this problem is insurmountable in the future in both
better transmission and storage technology
and
2. If half our electricity could be generated that way it would still be a
massive improvement over the 20 percent or so "green" energy currently being
produced, and go a long way towards eliminating dependence on foreign oil. I
also don't discount the other sustainable sources such as wind and wave
energy. Between the three they could replace the majority of fossil fuels
needs used for electricity. However it appears that wind and wave energy
both still need improvements in transmission availability to make it work.
..
There are some extremely efficient solar arrays in use right now already
providing a substantial portion of energy to major countries like Spain.
Note the concentrating tower system and the thermal storage systems already
in place.
http://en.wikipedia.org/wiki/Solar_power_in_Spain
No, that will require more efficient and practical methods of energy
storage. However the technology already exists to replace a substantial
portion of oil and coal dependent electricity.
You have to start somewhere. Somewhere does not have to mean not doing it
until it's a 100 percent solution. That would be illogical.
Not according to the Wiki article which cites a molten salt solution in
Granada.
Somehow Spain has already managed to exceed a "tiny percentage", whatever
that is. The difference in countries like Spain and Brazil is that they have
made extensive, sweeping commitments to better energy technology and have
national cohesive energy policies, while in the US we have nothing like
that.
Better technology will come around that will drastically reduce the
footprint. There are already developments in photovoltaics which promise to
greatly improve efficiency. Again, those improvements are at the mercy of
whether nations will commit to sustainable technology under a comprehensive
national energy policy. It seems politics stands more in the way of progress
in the US than science.
I'd like to see some recent cites on that statement.
So then do the math on how much power could come from solar compared to how
much comes from fossil fuels right now, and tell me whether it's not a
massive net gain.
And science has always prevailed when given the chance and proper support,
but in this country, politicians love to gin people up into being suspicious
of science. And 60 percent is a whopping improvement. Think about how many
less megatons of CO2 would be pumped into the air every year if we hit that
mark.
That's presumptive based on current photovoltaics, right? And there is
plenty of space to do it in this huge country of ours.
Agreed. That is something people can do right now, today.
There are entire factories already in existence in this country and
elsewhere which take little or no power from the grid. There is new
technology being developed in which buildings can actually be coated in a
photovoltaic paint. The notion that our structures can be energy producers
is already a reality which is under development. I have no problem with it.
As with many things, the cost will go down as production goes up.
MartyB