ABSTRACT
The environmental impact of an emission will depend on the future emission scenario. With low emissions the impact of an extra kg emitted will be small, with high emissions it may lead to severe damages. Halogenated organic compounds may cause depletion of the stratospheric ozone layer and contribute to climate change. The long-time perspective introduces a large uncertainty in the estimation of the environmental impact factor. CFC-11 and many other halogenated organic compounds have long residence times in the air and for a long time an extra kg of CFC-11 will contribute to decreased stratospheric ozone layer. CFC-11 is a short name for trichlorofluoromethane. It was earlier used frequently for refrigeration and foaming but was banned after the International Montreal Agreement due to its negative effect on the stratospheric ozone layer. WHO estimates an average incidence of around 50 cases per million inhabitants per year until 2100, when excess cancer incidence ceases.
