Characterisation Method Name: 
CFC11 impact on YOLL 
Version: 
1999 
Date Completed: 
1999 
Principal Method Name: 
EPS: stratospheric ozone depletion pathway and global warming pathway 
Method Description: 
YOLL stands for Year of Lost Life. Model 1, stratospheric ozone depletion pathway The characterisation factor is determined by the empirical method. Category indicator value in system considered The mortality in Holland due to skin cancers is expected to increase to 3 cases per million per year in the white population the year 2040 and then decrease (Slaper, 1993). If the white global population is around 1 billion this means 3000 cases per year. If compensated for population growth it will be slightly more. The global population is expected to grow to around 910 billion at the end of 2000. Most of the growth is however not in the white population, why the average incidence is assumed to be only slightly higher, 3500 cases per year. The average reduction of life expectancy was estimated in "Benzene impact on YOLL" to 24 years. Thus, the category indicator value is 3500*24*100 = 8400000 YOLL. Contribution to category indicators value from a flow unit According to IPCC (Intergovernmental Panel on Climate Change) business as usual estimate (including agreed emission reductions) the global emissions of freons in terms of CFC11 equivalents will be 2.5 E+10 kg for the next 100 years. Therefore the contribution of 1 kg CFC11 (with respect to Ozone Depletion Potential) is 4E11 kg 1 . Calculation of pathway specific characterisation factor The pathway specific characterisation factor is thus 8400000*4E11 = 3.36E04 YOLL/kg CFC11. Model 2, global warming pathway The characterisation factor is determined by an equivalency method using CO2 as a reference. Equivalency factor The GWP100 for CFC11 is 4000 (IPCC, 1994). Calculation of pathway specific characterisation factor The characterisation factor of CO2 for YOLL was determined to 7.93E–07 YOLL/kg CO2. Thus the global warming pathway specific characterisation factor for CFC11 is 4000*7.93E–07 = 3.17E–03 YOLL/kg CFC11. Calculation of characterisation factor The resulting characterisation factor from adding the two pathways is 3.36E04 +1.62E–02 = 1.65E–02 YOLL/kg CFC11. 
Literature Reference: 
1. Slaper, H., RIVM, Conferens on Comparative Risk Analysis and Priority Setting, June 711 1993, Keystone, Colorado,USA. 2. IPPC, “The 1994 Report of the Scientific Assessment Working Group of IPCC. Summary for policymakers”, WMO and UNEP, 1994 
Methodological Range: 
CFC11 has a very long residence time in air. According to IPCC it is 50 years. The effects are global. The greenhouse end point effects are assumed largely to depend on how fast the temperature change is why the next 100 years have been chosen as a system border for CO2 effects. The duration of effects caused by depletion of the ozone layer are much longer, but applying an emission scenario following the Montreal agreement and addendum of Copenhagen and London, most of the effects are likely to have occurred before 100 years. The environmental system borders chosen are therefore global and 100 years. 
Notes: 
Characterisation Parameter  Category Indicator  Impact Indication Principle  Aspect  Substance  Quantity  Unit  Notes  
CFactor  YOLL  EPS/2000 

CFC11  1.65E02  p yr/kg  2 pathways 