# Biogenic Carbon Accounting for Food and Textile MSMEs: The Honest Guide

Canonical: https://senseible.earth/climate-intelligence/biogenic-carbon-accounting-food-textile-msme

Published 2026-05-06.

Biogenic CO2 is the carbon released when biological material (wood, cotton, sugarcane bagasse, food waste) decomposes or burns. Whether it counts as "zero" depends on accounting rules, not chemistry.

## The IPCC default

IPCC AR6 treats biogenic CO2 from sustainably managed sources as carbon-neutral over the harvest cycle. Methane and nitrous oxide from the same biomass are NOT zero: they have GWP of 27.9 and 273 respectively.

## Where MSMEs get this wrong

- Burning rice husk or bagasse and reporting "zero emissions"
- Forgetting CH4 leakage from anaerobic decomposition in food waste
- Applying biogenic-zero rules to cotton without proving regenerative practice

| Source | CO2 treatment | CH4/N2O treatment |
| --- | --- | --- |
| Sustainable wood biomass | Reported separately as biogenic, often netted to zero | Counted in fossil totals |
| Rice husk combustion | Biogenic CO2 separately | CH4 from incomplete combustion counted |
| Cotton field residue | Biogenic CO2 separately | N2O from soil counted |
| Food waste to landfill | Biogenic CO2 | Significant CH4, counted |

The mistake is reporting one number. Report biogenic CO2, fossil CO2, CH4 and N2O on separate lines so a verifier can see the logic.

## Practical reporting template

For each biomass input, capture: source, mass, moisture content, end-use (combustion, decomposition, product), and document whether sustainability certification (FSC, BCI, Bonsucro) exists.

## What CBAM and CSRD say

CBAM excludes biogenic CO2 from embedded emissions if the biomass meets EU RED III sustainability criteria. CSRD requires you to disclose biogenic carbon as a separate line in the ESRS E1 emissions tables.

Use the [PCF calculator](https://senseible.earth/calculators/product-carbon-footprint): biogenic CO2 is split out automatically when you select biomass-based materials.

## Related guides

- [What is GHG-6 and how do we calculate warming impact beyond CO2?](https://senseible.earth/climate-intelligence/ghg-gases-warming-impact-beyond-co2)
- [Do methane and black carbon reductions count differently from CO2?](https://senseible.earth/climate-intelligence/methane-black-carbon-reductions-vs-co2)
- [Cold Chain MSMEs: Refrigerant Leakage Can Dominate Your Carbon Footprint](https://senseible.earth/climate-intelligence/msme-cold-chain-refrigerant-leak-carbon-2026)