In terms of KgCO2eq, openLCA provides flow diagrams with positive and negative values. How should these be interpreted?

Question

Once the results in terms of KgCO2eq are obtained, openLCA provides flow diagrams with both positive and negative values. How should be interpreted? Do they represent alternatives to the various phases?

Answer 1

You may have carbon uptake in your system, or use system expansion, which both can lead to negative results?

Comments

We don't understand why when we consider some types of plastic materials, in addition to the impacts, we are also evaluating "alternatives" of plastic materials with a positive impact that reduces CO2 emissions.
Then in some cases when we consider the impacts of electricity, glass containers that have a high impact are also considered.