Integrity shown
Additionality: the project must show it with a test (2022 V3 §1.2.3, p. 4). CarbonMeld reads the test in the documents.CM-F-PURO-BIOCHAR-ADDITIONALITY
PURO-BIOCHAR — Biochar
About this methodology
Biomass is heated without oxygen to make biochar, a stable form of carbon. The methodology certifies the carbon dioxide removal stored in the biochar.
- Issued by
- Puro.earth (PUR) · issuer's site
- Version
- 2025.2 · source ·
- Climate outcome
- CO2 removals
- Activity
- Biochar
- Official page
- puro.earth ·
How our current method reads projects of this type
Versions of the official text these rules cover: Edition 2022 V3, Edition 2025 v2
What CarbonMeld reads
- shown
Durability of the storage: the methodology sets rules for it (2022 V3, p. 3). CarbonMeld reads it in the project's documents.CM-F-PURO-BIOCHAR-DURABILITY-MEASUREMENT
- shown
Sustainability of the feedstock: the methodology sets rules for it. CarbonMeld reads it in the project's documents.CM-F-PURO-BIOCHAR-FEEDSTOCK-SUSTAINABILITY
- shown
Tracking of the end use: the methodology sets rules for it (2022 V3 §5, p. 14). CarbonMeld reads it in the project's documents.CM-F-PURO-BIOCHAR-END-USE-TRACKING
Figures set against the methodology's own values
- Integrity comparison
The crediting period is 10 years (p. 15). CarbonMeld compares the length of the period with it. This applies to a period that begins on or after 2025-11-27 (Edition 2025 v2).CM-F-PURO-BIOCHAR-CREDITING-LENGTH
crediting period: 10 years · from Edition 2025 v2 · source: Edition 2025 v2, p. 15
Deductions that can apply
- Integrity deduction −1.0
Biochar: if the documents read do not state how long the carbon stays stored, CarbonMeld lowers integrity by 1.0. It also shows a red flag.CM-G-PERMANENCE-CLAIM-NOT-STATED
since engine 72 Link - Claim safety deduction −1.0
Biochar: if the documents read state that nobody tracks the end use of the biochar, CarbonMeld lowers claim safety by 1.0.CM-G-END-USE-NOT-TRACKED
since engine 72 Link - Claim safety deduction −0.5
Biochar: if the documents read state that the project does not address the feedstock's sustainability, CarbonMeld lowers claim safety by 0.5. It also shows a red flag.CM-G-FEEDSTOCK-NOT-ADDRESSED
since engine 72 Link
Set by the methodology or the programme, not assessed by our current method
- not assessed
Leakage: the methodology sets rules for it in some cases (2022 V3 §4.1, p. 8). Our current method does not assess it.CM-F-PURO-BIOCHAR-LEAKAGE
- not assessed
Permanence and reversals: the methodology sets rules for it (2022 V3, p. 2). Our current method does not assess it.CM-F-PURO-BIOCHAR-PERMANENCE-REVERSAL
- not assessed
No legal requirement for the activity: the methodology sets rules for it in some cases. Our current method does not assess it.CM-F-PURO-BIOCHAR-REGULATORY-SURPLUS
- not assessed
Social safeguards and consent of communities (FPIC): the methodology sets rules for it in some cases (2022 V3 §1.2.2, p. 4). Our current method does not assess it.CM-F-PURO-BIOCHAR-SAFEGUARDS-FPIC
Not applicable to this type — never a gap in our current method
The criterion does not apply to this methodology. Our current method never counts it as a gap.
- Grid emission factorCM-N-GRID-EF
- Buffer poolCM-N-BUFFER
- Fraction of non-renewable biomass (fNRB)CM-N-FNRB
- Usage rate of the devicesCM-N-USAGE
The general rules apply as well. Read the general rules.
History and transitions
Top projects using PURO-BIOCHAR
This page ranks projects using PURO-BIOCHAR by their CarbonMeld document-based assessment scores. The rank compares project assessments; it is not a rating of the methodology itself.
73 rated projects of the 79 tracked in this methodology · average score 5.6/10 · ranked by CarbonMeld's document-based assessment scores across all four dimensions: integrity, transparency, claim safety and documentation. Showing the top 50.
73 analysed project pages, A–Z →
- 4 7.3 ▲ +2.1
- 5 7.2 ▲ +0.4
- 6 7.2 ▲ +3.8
- 7 7.1
- 8 7.1 ▲ +3.7
- 9 7.1 ▲ +2.2
- 10 7.1 ▲ +1.7
- 11 7.1
- 12 7 ▲ +2.7
- 13 6.9 ▲ +1.9
- 14 6.9 ▼ -0.2
- 15 6.8 ▲ +1.5
- 16 6.8 ▲ +1.5
- 17 6.7 ▲ +1.5
- 18 6.7 ▲ +1.7
- 19 6.7 ▲ +2.5
- 20 6.7 ▲ +2.6
- 21 6.7
- 22 6.5 ▲ +1.4
- 23 6.5
- 24 6.5 ▲ +0.3
- 25 6.4 ▲ +2.8
- 26 6.4 ▲ +0.2
- 27 6.2 ▲ +0.8
- 28 6
- 29 6 ▲ +2.4
- 30 5.9
- 31 5.9 ▲ +0.8
- 32 5.9 ▲ +1.5
- 33 5.9 ▲ +1.1
- 34 5.9
- 35 5.9 ▲ +0.8
- 36 5.8 ▲ +1.7
- 37 5.8 ▲ +0.5
- 38 5.8 ▼ -0.6
- 39 5.5 ▲ +3.7
- 40 5.5 ▲ +1.2
- 41 5.5 ▼ -0.2
- 42 5.3
- 43 5.2
- 44 5.2 ▼ -0.1
- 45 5.2 ▼ -0.2
- 46 5.2 ▼ -1.0
- 47 5.1 ▼ -0.5
- 48 5 ▲ +1.0
- 49 5 ▼ -0.2
- 50 5 ▼ -0.4