Cookstove and Agriculture Carbon Credits: What Buyers Should Check

Picture a kitchen in rural Odisha. Dinner is cooked over three stones and an open wood fire, the room fills with smoke, and someone in the family spends hours each week collecting fuel. Replace that fire with an efficient stove and the household burns less wood, breathes cleaner air and saves time. Multiply by fifty thousand kitchens and you have a carbon project.

The Agriculture category on our marketplace groups this kind of distributed, household- and farm-level activity. The three types we see most are improved cookstoves, methane reduction in rice paddies, and solar irrigation pumps. They share one trait: the emission reduction depends on how millions of small, everyday decisions are made, so monitoring is everything.

How the credits are created

Improved cookstoves

An efficient biomass stove, or a switch to LPG, biogas or electric cooking, cuts the amount of wood burned per meal. The credit covers the CO₂ from wood that would not have regrown, plus some methane and nitrous oxide from burning. Two numbers drive the volume:

• Fuel saved per stove, estimated from kitchen tests and surveys.
• fNRB, the fraction of non-renewable biomass: the share of the wood collected that is not being replaced by new growth. If the forest around a village regrows faster than it is cut, saving that wood does little for the climate, and fNRB is low. If it is being steadily depleted, fNRB is high.

fNRB has been the most debated number in this category. Older projects sometimes used high default values that research later suggested were too generous. Newer methodologies and updated tools use more conservative or locally derived figures.

Rice methane: alternate wetting and drying

Flooded paddies give off methane because bacteria in waterlogged soil break down organic matter without oxygen. Under alternate wetting and drying (AWD), farmers let the field dry out for a few days between irrigations, which cuts methane sharply without harming yields when done well. Projects in Punjab, Haryana, Telangana and elsewhere enrol farmers, train them, and monitor water levels with simple field tubes, sensors or satellite data.

Solar irrigation pumps

Diesel pumps are common where grid power is unreliable. A solar pump replaces the diesel, and the credit is based on the fuel no longer burned. Government support schemes such as PM-KUSUM have spread these pumps widely, which raises the additionality question discussed below.

What a buyer gets

Cookstove and solar pump credits are reductions or avoidance: less fuel burned than before. AWD credits are reductions in methane. None of these are removals. Check the project type field on the listing to see how a particular project is labelled.

The main quality questions

Are the stoves actually used?

A stove handed out is not a stove in use. Families often keep cooking on the old fire for some dishes, a habit known as stacking. Good projects track usage through regular household surveys, and increasingly through stove use monitors: small temperature sensors that log when the stove is lit. Ask what share of stoves were found in use at the last verification, and how stacking was accounted for.

Is the fNRB figure defensible?

Ask which value the project uses, where it came from, and whether it has been updated. A project still relying on a high old default is a risk to your claims if that number is later challenged.

For AWD, how is drying verified?

Farmer self-reporting alone is weak. Field tubes checked by staff, water-level sensors or remote sensing give more confidence. Ask how many fields were sampled and how the project handles farmers who drop out.

Additionality where subsidies exist

If a solar pump or LPG connection was largely paid for by a government scheme, the project must show that carbon finance still made a difference. The validation report should address this. Our page on additionality, permanence and leakage covers the tests.

Double counting across programmes

With thousands of households, two projects can end up claiming the same kitchen or farm. Ask how the developer checks against overlapping programmes in the same districts.

Co-benefits

This category often has the strongest social story. Cleaner cooking reduces household air pollution, a leading health risk for women and children in India. Less wood collection frees up time, often for girls' schooling. Solar pumps cut farmers' fuel bills, and AWD saves irrigation water. Common SDG tiles are Good Health (SDG 3), Gender Equality (SDG 5), Affordable and Clean Energy (SDG 7) and Clean Water (SDG 6). Some Gold Standard projects carry certified health or gender outcomes. Our guide to SDGs and co-benefits explains how to weigh them.

What to ask the seller

1. Registry ID, methodology and the version used.
2. Number of stoves, farms or pumps covered in the vintage on offer, and their districts.
3. The usage rate found at the latest verification, and the monitoring method.
4. The fNRB value (for cookstoves) and its source.
5. How subsidies were treated in the additionality argument.
6. How overlap with other projects was ruled out.
7. The latest verification report and registry issuance record; see project documents buyers receive for what each should contain.

On this marketplace

Agriculture listings show the methodology, vintage and estimated annual reductions, which helps you spot projects using newer methods. Browse the Agriculture category, and when you find a lot that looks right, use "Request to buy" on the project page and list the monitoring questions above in your message so we can raise them while the documents are prepared.