Estimated national releases to the atmosphere of chlorodifluoromethane (HCFC-22) during 1990

Chlorodifluoromethane (HCFC-22), the most widely used substitute for chlorofluorocarbons, is currently emitted into the atmosphere at a global rate of about 220,000 tyr−1. In this work, national emissions of HCFC-22 for the year 1990 are estimated using the calculated emissions of CFC-12 as a surrogate distribution function. The releases so calculated match the sp arse published data in most cases.