ql: Quality Of Life
Variable
Global
Quality Of Life []
ql = qls * qlm * qlc * qlf * qlp

ql in the updating graph: ( how to read )
In nodes
qlc : quality of life from crowding
qlf : quality of life from food
qlm : quality of life from material
qlp : quality of life from pollution
qls : quality-of-life standard (satisfaction units)