The meme that an effective carbon tax would ruin entire economies is pretty much just scaremongering. For a brief period in Australia's recent history, we had a

The meme that an effective carbon tax would ruin entire economies is pretty much just scaremongering. For a brief period in Australia's recent history, we had a carbon tax with quite a moderate impact economically which measurably reduced our carbon output. http://www.smh.com.au/environment/climate-change/carbon-price-helped-curb-emissions-anu-study-finds-20140716-ztuf6.html http://www.smh.com.au/environment/climate-change/carbon-pric... The other point I'll make about huge big-bang projects is that in recent decades they've only ever been achieved by authoritarian regimes that don't need the kind of consensus that kills such projects in western democracies. We live in a world where a significant fraction (perhaps majority?) of the citizenry is largely ignorant, anti-science, distrusts authority, believes in outrageous conspiracy theories and lacks the ability to form coherent thoughts about most things. I put it to you that your chance of getting a large-scale geo-engineering project supported by that majority at a direct cost to them (a cost that can't be moderated by behaviour changes by the way) is practically zero outside an outright dictatorship.