Shape the
road to COP31.

Carbon neutrality is a complex subject. We prefer to simply explain the facts. The purchase funds methane reduction by keeping organic waste out of landfills. After fulfilment, the credits are retired and recorded in your account and the impact is recorded. Your own emissions remain; this purchase does not erase them.

The biowaste credit stack includes a Carbon Credit (from reduced landfill methane) and a Recycling Credit (from composted organic waste) traceable to a single unit of waste (MassID), recorded and publicly accessible on the Carrot ledger. The proceeds of each purchase are distributed among the participants in the project and the developers of its integrity infrastructure, and the distribution is shown once the purchase is complete. Methane reduction is worth 3–4× the value of carbon on near-term climate cooling (IGSD, Carbon Containment Lab and others). We suggest US$30/tCO₂e for biological treatment, a premium over landfill gas capture and utilization for the fugitive emissions it prevents and the system change it funds. At 4×, that yields US$120/tCO₂e, lower than the average price of biochar at US$136/tCO₂ (CDR.fyi) for carbon removal through biomass pyrolysis. The recycling credits add US$33.53 per tonne of CO₂e, priced as the co-benefits produced through a separate methodology and verification model. Our own modelled analysis values those co-benefits in Brazil at about US$100 per tonne of organic waste (reduced public waste-handling and health costs, and recyclables recovered), and assigns no value to green jobs, soil carbon or chemical fertilizer substitution. The recycling credits are therefore priced at a discount of about 66%. Together, the two credits come to US$153.53 per tonne of CO₂e, and the number of recycling credits that come with each tonne depends on the amount and type of waste behind the specific methane reduction (GasID), and is set once the order is fulfilled. The stack creates a premium category for waste methane credits called Circularity, launched with AlliedOffsets in October 2025 to differentiate it from landfill gas destruction and utilization, and presented at NY Climate Week 2026. The biowaste credit stack enables not only methane reduction and the build-out of critical infrastructure, but also pulls recycling policy forward and funds system change toward circularity. It is catalytic carbon finance, where the cost of carbon ultimately goes to zero as other policy frameworks take hold: first producer responsibility for food (Food EPR), then waste charges based on what each generator throws away. The cost will decrease progressively with economies of scale, delivering on the promise of achieving net-cost savings at a system level in the waste sector methane category (UNEP Global Methane Status Report 2025). This is the circular transition.

Additionality. In Latin America and the Caribbean, less than 1% of municipal waste is composted or anaerobically digested. In Brazil, composting accounts for around 0.4%. Sending a tonne of organic waste to landfill costs less than composting it, and credit revenue is what closes that gap. Permanence. The reduction is complete by design: methane that never forms cannot leak, escape or be re-released. Nothing is stored, so there is no reservoir to monitor and no reversal to insure against. Leakage. Every load is tracked from pick-up to the composting facility, inside a project boundary capped at 200 km. The methodology also applies conservative assumptions to how the finished compost is used. Fugitive emissions. Food waste decays fast, and much of its methane forms before a landfill's gas collection is installed. The US EPA estimates that landfills with gas capture collect only about 50% of the methane from food waste over its lifetime, and that up to 61% is never captured where collection starts at the regulatory minimum. Gas capture manages the methane already in landfills. Keeping organic waste out stops new methane at the source and enables the broader circular economy to function, which further reduces emissions through resource-use efficiency. Both are needed. Composting has emissions of its own: a small amount of methane and nitrous oxide, plus fuel and electricity. The methodology counts them and subtracts them, so the reduction shown on your purchase is net. Bureau Veritas validated the methodology in February 2025 and concluded that, applied correctly, it generates additional and permanent results.