|Characterisation Method Name:|
|Pb air emissions impact on severe nuisance in the world|
|Principal Method Name:|
|EPS: brain effects pathway|
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
Calculation of characterisation factor
This will result in a characterisation factor of 1E+08 /3.44E+08 = 0.291 person-years/kg Pb.
|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.|
|The system considered is anywhere in the world during 1990.|
|Characterisation Parameter||Category Indicator||Impact Indication Principle||Aspect||Substance||Quantity||Unit||Notes|
|Pb||0.291||p yr/kg||brain effects pathway|