Some factual and some snarky answers, which is to be expected, but friend, all the answers boil down to: You have massively underestimated the size of the Earth, including the staggering amount of water on the Earth, underestimated the weight of water, and/or overestimated the size of current human rockets.

It would take more than 90 of today's largest rockets to lift a single Olympic swimming pool's worth of water into space. It really doesn't matter how cheap it gets, there's simply no way it'll ever get cheap enough to move an appreciable amount of water off the Earth's surface.

(via rockets)