Carbon removal (CDR) projects: biochar, enhanced rock weathering and engineered removals

Carbon dioxide removal (CDR) projects take CO₂ out of the atmosphere and store it – in biochar, in rock minerals, underground or in long-lived products. VPA India helps project owners in India and abroad choose a standard and methodology, design the measurement, and bring projects to issuance of CORCs or Isometric Certificates.

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Who it is for

Biochar producers and processors of crop and forest residues
Mining, quarry and mineral companies with rock suitable for enhanced weathering
Industrial sites with biogenic CO₂ that can be captured and stored
Buyers who want durable removals in their portfolio

Pathways we work on

Biochar
Enhanced rock weathering
Bioenergy and biomass carbon removal and storage (BECCS and BiCRS)
Direct air capture with storage (DACCS)
Carbonated materials and mineralisation
Marine carbon removal

Standards and units

Puro.earth. One CORC stands for one tonne of durably removed carbon, with durability of over 100 years, issued in the Puro Registry. Its methodologies include biochar (200+ years), enhanced rock weathering (1,000+ years), geologically stored carbon (1,000+ years), carbonated materials (1,000+ years) and terrestrial storage of biomass (100+ years).
Isometric. An Isometric Certificate for carbon dioxide removal stands for the net removal of one metric tonne of CO₂e. Isometric issues no certificates in advance; accredited validation and verification bodies validate projects and verify removals against ISO 14064-3, and the default durability threshold is 1,000 years unless a protocol sets another.
CORSIA. Isometric is one of the programmes on ICAO's list for the first phase (2024–2026), with exclusions that leave out several removal protocol categories and units without a host-country attestation.
Net removal. Credits count the CO₂ stored minus the emissions from energy, transport and processing, and any leakage.

How we work

Screening. We check the feedstock, rock or CO₂ source, the volumes and the storage, and estimate the likely net removal.
Standard and methodology. We compare Puro.earth, Isometric and other options for your pathway, your buyers and your costs.
Measurement design. We set the sampling, laboratory tests, emissions accounting and records the methodology requires.
Project documents. We prepare the project design and monitoring documents and support validation.
Verification and issuance. We prepare each monitoring period for verification and support issuance and sale.

What you receive

A screening-level feasibility study with an estimate of net removal
A standard and methodology recommendation
A monitoring plan with parameters, frequency, data sources and quality checks
Project documents ready for validation

Track record

Since January 2008, VPA India has provided consultancy and audit services for carbon credit and corporate sustainability reporting projects, and our founder is a former DOE/VVB lead auditor (SGS SA).

Frequently asked questions

What is the difference between removal and reduction credits?

Reduction credits come from avoiding emissions, for example by replacing fossil power; removal credits come from taking CO₂ out of the atmosphere and storing it. Isometric, for example, issues separate certificates for removals and for reductions.

How long must the carbon stay stored?

It depends on the standard and the pathway: Puro.earth lists durability from 100+ to 1,000+ years by methodology, and Isometric uses a 1,000-year default unless a protocol sets another threshold.

Can a CDR project also earn CCUs under India's CCTS?

India's CCTS offset mechanism does not allow a project to be registered in another carbon market at the same time, so the choice of programme comes first. Our CCTS (offset mechanism) page explains its rules.

What do you need from us to start?

The feedstock or rock type and volumes, the process and its energy use, the end use or storage site, and any laboratory data you already hold.

Sources

Puro.earth, Carbon removal methods (puro.earth), page updated 30-Apr-2026, read 13-Nov-2026.
Puro.earth, CO₂ Removal Certificate (CORC) (puro.earth), read 13-Nov-2026.
Isometric, Isometric Standard, version 2.2 (registry.isometric.com), read 13-Nov-2026.
International Civil Aviation Organization (ICAO), CORSIA Eligible Emissions Units, 14th edition, 1 April 2026 (icao.int), read 13-Nov-2026.
Bureau of Energy Efficiency, Detailed Procedure for Offset Mechanism under CCTS, version 1.0, effective 27-Mar-2025 (beeindia.gov.in), read 08-Nov-2026.