C. Weather Information Interest in the possible effects of nuclear detonations on the weather fall into two classes; one, direct effects because of the energy released, and two, triggering effects. The latter effects might /(a) a catalytic effect from the particles thrown into the atmos- phere (something akin to cloud seeding with silver iodine crystals), (b) a change in the electrical conductivity of the air since radio- active debris contains charged particles, and (c) a reduction of solar energy received on earth owing to the quantity of dust thrown into the atmosphere. The Data The conclusions of many studies and experiments of these possible effects are best described in Reference 22: 1. " . . . The energy of even a thermonuclear explosion is small when compared to most large-scale weather processes. Moreover, it is known that much of this energy is expended in ways that cannot directly affect the atmosphere. Even the fraction of the energy which is directly added to the atmos- phere is added in a rather inefficient manner from the standpoint of affecting the weather. Meteorologists and others acquainted with the problem are rgadily willing to dismiss the possibility that the energy released by the explosions can have any important direct effect on the weather processes .. ." 2. “ . . . The debris which has been thrown up into the atmosphere by past detonations was found to be ineffective as a cloud-seeding agent . . i