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Characterisation Method Information
Characterisation Method Name:
Pb air emissions impact on severe nuisance in the world
Version:
1999
Date Completed:
1999
Principal Method Name:
EPS: brain effects pathway
Method Description:
Model

The characterisation factor is determined by the empirical method.

Category indicator value in system considered

About 17% of the population in USA is estimated to have a decrease in IQ (A General Intelligence Quotient Score ) of three units in the beginning of the 90ies (Grant et al., 1993). Heavy car exhaust has mainly been a problem for OECD (Organisation for Economic Co-operation and Development) countries and some megacities outside OECD. This indicates that the problem is in the order of 100 million persons-years per year.

Contribution to category indicators value from a flow unit

The global lead emission was 344000 tons/year 1983 as estimated by Pacyna. (UNEP
1992)

Calculation of characterisation factor

This will result in a characterisation factor of 1E+08 /3.44E+08 = 0.291 person-years/kg Pb.
Literature Reference:
1. Grant. L and Elias, R., Symposium on Comparative Risk and Priority Setting of Air Pollution Issues, Keystone Colorado June 7-11, 1993. 2. UNEP Environmental data report 1991/92 p. 36, 1992.
Methodological Range:
The system considered is anywhere in the world during 1990.
Notes:

Existing Characterisation Factors of Pb air emissions impact on severe nuisance in the world
Characterisation Parameter Category Indicator Impact Indication Principle Aspect Substance Quantity Unit Notes
CFactor Severe nuisance EPS/2000
Type = Emission
Direction = Output
Media = Air
Geography = *
Pb 0.291 p yr/kg brain effects pathway