What is the meaning of a process with zero inputs and outputs?

[dt-woods]

What is the meaning of a process with zero inputs and outputs?

[dt-woods]

Since there are values in both CA-B-U and CA-B-S, I'm guessing this isn't working properly, then.

[m-jamieson]

The way this is supposed to work is that the coal inventory function looks in the inventory csv for an exact match - CA-B-U (central appalachia, bituminous, underground mined coal). There is logic in there to fill in gaps as necessary (or there's supposed to be). CA-B-P would be a gap - we don't count processing facilities as "mine type". The intention in this case is to use a weighted average of CA-B-U and CA-B-S profiles, since a processing plant could be getting it's bituminous coal from underground or surface mines.

[m-jamieson]

The filling in of missing scenarios starts here: https://github.com/USEPA/ElectricityLCI/blob/2232c41f2cb4fd333ad59c8710aa55906e6a7ed3/electricitylci/coal_upstream.py#L325