If, in the future, we end up resorting to such desperate measures, someone will have to compare the costs of these schemes to the estimated costs of reducing CO2 emissions sufficiently, had we begun in time. Like the Iraq war, I expect to be proven right.
On the other hand, the fact that the NYT is still writing paragraphs like this:
Geoengineering is no magic bullet, Dr. Cicerone said. But done correctly, he added, it will act like an insurance policy if the world one day faces a crisis of overheating, with repercussions like melting icecaps, droughts, famines, rising sea levels and coastal flooding.One day? You dumbass, haven't you been to New Orleans lately?
God help me, if the human species survives to 2050 it will be in spite of the media, not because of it.
I should point out that, in my continuing space-nerdery, I actually like the idea of a crash program to develop giant orbiting parasols. To be built, they'd almost certainly need asteroid mines and reusable launch vehicles. That said, I'd prefer to have orbital parasols be entirely unnecesary.