I'm interested to hear your thoughts on cloud whitening. It seems to me a relatively safe way to cool the earth (setting aside for a moment the question of whether cooling the earth is itself a remotely safe thing to do), but I haven't done any research on it. One would think it a far, far less genocidal way of appeasing the global warming fanatics than spraying heavy metal nanoparticles into the air, which starts forest fires and kills bees and plenty of other ostensibly unintended side effects.