Ventana software support forum

I have a problem with units and i could not correct them, for example: Error in units for the following equation:
Environmental conservation =
Energie stock
+ Freshwater stock
+ Waste water reuse for tourism sector
- Pollution stock
Environmental conservation --> KWH*Kg*Month/m3
Energie stock --> KWH*Month
Freshwater stock --> m3
Waste water reuse for tourism sector -->
Pollution stock --> Kg

Analysis of units error:
Units mismatch
Energie stock
Has Units: KWH*Month
Freshwater stock
Has Units: m3

which unit should i use for environmental conservation, thank you

What is "environmental conservation" measured in?

I don't see how you can add together "KWH*Month" and "m3".