An example of a process which has not been adequately included is cloudiness. Cloud cover is an extremely important process in the atmosphere because it so strongly determines the degree of transmission and reflection of solar radiation. Although considered to be one of the most critical unsolved problems in atmospheric science, it is not treated well, because its parameterization is so inaccurate. Yet, if it were to be seriously considered, the estimates of global warming would most likely be reduced because of the feedback process between warming and cloud cover. The more the warming, the more the cloud cover; the more the cloud cover, the less the solar transmission, and, probably, the less the warming. The real atmosphere is a very stable system, and probably will not produce the major changes predicted by the GCMs, which do not include these cloud cover effects.