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space elevators seem to be my choice.
why? it's simple, while a high cost to build, low cost to operate (compared to the STS). plus, it opens up space to the average person. sure, it's a lot slower, but you can send up a lot heavier stuff and a lot more stuff at once. anyway i look at it, a win-win situation. the technology is almost here, we're just waiting for someone to implement it now i think.
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