re: Re-Engineering Earth
Planetary husbandry isn't a new idea, and it must be inevitable, unless we want to continue forever to be victim of mass catastrophes of one sort or another. (along with solar-system and stellar hunbandry)
Granted, the best idea right now is to stop using as our primary energy source for most of our transport; The burning of dead dinosaur food in IC engines based on patents from the 1890s.