rct: Resource Conservation Technology
Variable
Nonrenewable resource sector
Resource Conservation Technology [Dmnl]
rct = rct - dt*( rctcr )

rct in the updating graph: ( how to read )
In nodes
rct : Resource Conservation Technology
rctcr : resource technology change rate
Out nodes
nruf2 : resource use fact 2
rct : Resource Conservation Technology
rctcr : resource technology change rate