pptcm: Persistent Pollution Technology Change Multiplier
Variable
Persistent pollution sector
Persistent Pollution Technology Change Multiplier [1/year]
pptcm = tabhl ( pptcmt , 1 - ppolx / dppolx , -1, 0, 1)

pptcm in the updating graph: ( how to read )
In nodes
dppolx : desired persistent pollution index
ppolx : persistent pollution index
pptcmt : persistent pollution technology change mult table
Out nodes
pptcr : persistent pollution technology change rate
tabhl
