BBCNEWS HARDtalk June 4, 2024 22:41:00
Which makes it different from other — i mean, balloons aren't new, but balloons usually, as you say, are powered by helium, they are fired up, they involve inputs of energy. your balloon involves only trapping air and then using the sun's natural power to warm that air and the balloon rises. yeah, absolutely. now, that's kind of interesting, basically very simple and interesting, but i'm wondering what... your message seems to be, "we can all learn very "practical things from this," but what can we learn? well, i think that heat maybe can produce something can produce something that could tr...
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