Examines the potential climatic effects of the radiatively active trace gases that have been detected in the atmosphere including chlorofluorocarbons, chlorobarbons, hydrocarbons, fluorinated and brominated species, and other compounds of nitrogen and sulphur, in addition to CO2 and O3. A one-dimensional radiative-convective model is used to estimate trace gas effects on atmospheric and surface temperatures for three cases. Trace gases other than CO2 are shown to be potentially as important as CO2 for long-term climate trends.-from Authors