ppgr: Persistent Pollution Generation Rate
Variable
Persistent pollution sector
Persistent Pollution Generation Rate [Pollution units/year]
ppgr = ( ppgio + ppgao )* ppgf

ppgr in the updating graph: ( how to read )
In nodes
ppgao : persistent pollution generation agriculture
ppgf : persistent pollution generation factor
ppgio : persistent pollution generation industry
Out nodes
ablgha : “Absorption Land (GHA)”
ppapr : persistent pollution appearance rate