Solar geoengineering rests on a simple idea that it is technically possible to make the Earth a little more reflective so that it absorbs a little less sunlight, which would partly counteract some of the risks that come from accumulating carbon dioxide in the atmosphere. When I say technically possible, it appears that at least doing this in a crude way is actually easy, in the sense that it could be done with commercial off‐the‐shelf technologies now, and it could be done at a cost that is really trivial, sort of a part in a thousand or a part in ten thousand of global GDP.
You might have heard that this week Mark Zuckerberg and Priscilla Chan announced that they’re going to give away 99% of their Facebook stock in hopes of making the world a much better place for their newborn daughter and her generation. Now, I just want to be right up front with you. I have no inside information about this fascinating development. But what I do have is inside information, the inside story, on a gift that this couple made five years ago in their first act as philanthropists.
Unfortunately at the moment I think typically philanthropy is not being used very effectively, and that’s partly because of the kind of non‐judgmental attitude that philanthropy advisors and people generally have about philanthropy.