Nice one, hadn't seen that particular article about the problem before. A hidden underlying detail in my comment is an assumption that such a waste crisis is so

Nice one, hadn't seen that particular article about the problem before. A hidden underlying detail in my comment is an assumption that such a waste crisis is so far in the future that we'll have things like space elevators (making getting to orbit easy) and solar sails (making reducing the starting earth-to-sun relative velocity doable in less than a year), though.