Conclusion for those who don't want to read the whole thing And as a result, the curiously hubristic claim that such a trivial imbalance somehow perforce has to be due to human activities, rather than being a tenth of a percent change due to variations in cloud numbers or timing, or in El Nino frequency, or in the number of thunderstorms, or a tiny change in anything else in the immensely complex climate system, simply cannot be sustained.