[amerfort]

Purpose of this PR

This PR adds biochar to the ScenarioMip mapping.
Biochar uses primary energy biomass and turns it into carbon removals, potentially co-producing heat, electricity or biofuels.
This PR adds the biomass demand on Primary Energy level (in the category other), the CDR effect to Carbon Removals and the net emissions to CO2 Energy Supply Side (IAMC category other).

Checklist:

• I did not use Excel to open csv files or checked that no side-effects occur (changed values, many new quotation marks, …)
• I added any renamed piam_variable to renamed_piam_variables.csv to guarantee backwards compatibility.
• For REMIND variables, I used |+| notation consistently. This can be achieved automatically with updatePlusUnit().

It is recommended to have a look at the tutorial before submission.

[tabeado]

Thank you so much for solving my problem 🙏

[amerfort]

Note: Investment|Energy Supply|[Other or Biochar] are currently missing from the common definitions repo
Energy supply side investment variables
use the tag Secondary Fuel Level 2.
We need to add biochar together with the IAMC community properly or add at least "other" to this level to avoid these summation errors.