Factors of climatic change ... from a viewpoint of energy balance Changes of solar radiation received by the earth Changes of emission by the sun Changes associated with sunspot cycles Changes revealed by calibration of carbon 14 ages Changes due to those of constituents of the sun (H -> He) Changes of geometrical relationship between sun and earth Diurnal cycle; Annual cycle Changes of orbital parameters (Milankovitch forcing) Changes of matter in the space between the sun and the earth Changes of albedo (reflectivity to solar radiation) of the surface Ice-albedo feedback Changes of terrestrial radiation Changes of concentration of greenhouse gases Water vapor feedback Carbon dioxide; Methane Affecting both solar (albedo) and terrestrial (greenhouse effect) radiation Changes of clouds and aerosols