Most of us on slashdot will probably agree that "Economics, Energy, Carbon and Climate" are all one big problem that needs more investment. But the devil is in the details of how to do it.
I'm not an expert on this subject like Henson, but IMHO a space elevator seems just as close to being technically viable as space plane powered by a ground-based laser and microwave power beamed to earth.
Not only that -- a space elevator would be much cleaner and the cables might even be able to double as power transmission lines.
And -- since all the good tethering points are in the third world (the equator) it would be a big solution to economic disparities too.
Why does Henson's article not consider the possibility of a space elevator ?