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Lacks infrastructure. You have to remove heat compressing the air and then heat the decompressed air. I remember discussing a research effort to resolve that a year or two ago.
I could use the site's Search function, but you're the one that cares.
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.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
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.You can't be wise and in love at the same time. -- Bob Dylan
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