This is a removal process for chemicals in the atmosphere such as dissolution in bodies of water, removal via rain, photolysis, or by reactions with other atmospheric components. For instance, because of high chemical stability, the major atmospheric sink for the chlorofluorcarbon CCl₃F is photolysis in the upper atmosphere. In the troposphere this compound is extremely long-lived because it isn't very water soluble, doesn't react with other tropospheric components, and isn't microbially attacked in soils or by plants.