I'm something of a global warming fatalist, fairly convinced that whatever we actually do will be much too little, far too late. So this Rolling Stone article detailing geoengineering schemes to cool the planet was heartening. Whether blasting sulfate particles into the upper atmosphere would actually work to cool the planet (all the climatological models suggest it would, though it could destroy the ocean), it's certainly something that, if the trends turn too dire, we can try. Indeed, given the difficulty in both changing American behavior and telling China, India, et al that they can't utilize the cheap energy strategies the industrial world deployed for development, planetary engineering may well prove our only hope.
Also: Who knew the military actually figured out how to control the rain?