ReGenEarth, a U.K.-based sustainability-focused venture, and RER, a circular economy energy firm, have unveiled a £100 million ($134.67 million) green bond program aimed at financing the integration of biochar into existing renewable energy infrastructure.
According to a statement, the green bond will fund the deployment of biochar technology into existing anaerobic digestion and biomass facilities across the U.K.
Each installation will incorporate feedstock and provenance tracking systems to boost credibility and pricing within the voluntary carbon credit market.
RER Capital PLC, a special purpose vehicle set up to finance clean technology and circular economy projects, will issue the bonds.
Proceeds will be secured against hard assets, including the AD sites, and loaned to a wholly owned subsidiary of ReGenEarth on issuance.
The bonds will carry a 12.5 percent coupon, with a maturity date set for 2030. The program will follow the International Capital Market Association’s Green Bond Principles.
Investor Event Highlights
ReGenEarth formally introduced the bond at an Investor Day held June 10 at London’s Institute of Engineering & Technology.
The event featured participation from carbon rating agency BeZero, biochar engineering firm Onnu, and Brunel University’s Chemical Engineering Department, which presented on its SeaCure CO₂ capture project.
Discussions at the event centered on emerging carbon credit markets, carbon sequestration technologies and innovations in sustainable agriculture.
Tool for Climate Resilience
Biochar, a charcoal-like material produced by heating organic waste through a process known as pyrolysis, is gaining traction as a carbon sink and soil enhancer.
Its ability to lock carbon in soil for centuries makes it a valuable tool for both climate mitigation and agricultural productivity.
According to ReGenEarth, biochar’s porous structure enhances soil fertility, water retention and microbial activity, providing long-term benefits for food security and ecosystem resilience.
The firm is collaborating with its engineering partner, Onnu, to deploy these solutions commercially. “We’re turning waste into climate wealth,” said Mickey Rooney, CEO of ReGenEarth. “With 12.5 percent returns, locking carbon away for centuries, offering fertile ground for crop, climate and cash generation — the question is, why wouldn’t you want to be part of it?”
ReGenEarth’s bond offers an alternative for sustainability-focused investors seeking diversification beyond solar and wind, where heightened competition has squeezed returns. The company positions the initiative as part of a broader push to scale up technologies aligned with the circular economy and decarbonization goals.
