"All the technologies I'm exploiting currently in my lab and what I'm funding in other research labs are things that are close at hand, " said Col Hale.

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That's why I'm glad there are still new technologies capable of provoking outrage and debate.

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China has first class technologies and astronauts, and therefore I'm confident we will fulfil the manual rendezvous.

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For this combined population of 45 m people, they sought to test the benefits of "existing, readily acquirable technologies that would reduce greenhouse gas emissions from fossil fuels".

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