The Grantham Foundation

Travertine is a company focused on carbon dioxide removal and industrial chemical production, aiming to mitigate the environmental impact associated with the extraction of elements for renewable energy. Utilizing a proprietary electrochemical process, Travertine converts carbon dioxide from the atmosphere into mineral forms while simultaneously producing sulfuric acid, which is essential for critical element extraction and fertilizer production. The company effectively recycles sulfate wastes to generate sulfuric acid, thereby minimizing chemical waste during these processes. Additionally, Travertine generates high-quality carbon credits through its direct air capture and mineralization efforts, contributing to a sustainable approach in mining and fertilizer industries.

Arca is a leading carbon dioxide removal (CDR) company. Arca accelerates natural process of carbon mineralization, by reacting atmospheric carbon dioxide with ultramafic mine tailings rich in magnesium silicate minerals, such as serpentine and brucite. By leveraging partnerships with mining companies, Arca transforms mine waste into a carbon sink, permanently storing CO₂ as stable carbonate minerals. The company is at the forefront of scaling carbon dioxide removal (CDR) solutions by integrating geochemical expertise, real-time monitoring, and verification methodologies. Arca collaborates with major buyers of carbon removal credits, such as Shopify, Stripe, Watershed and MaRS, and has established formal methodologies for recognizing and quantifying mineralization in voluntary and compliance carbon markets.

Eden is focused on developing a sustainable platform for natural resource recovery, aiming to create a carbon-neutral future. The company has introduced a novel method known as Pulsed Electrical Well Stimulation (PEWS), which is a patent-pending technology designed to replace traditional hydraulic fracturing. This innovative approach eliminates the need for water injection and addresses the logistical challenges and environmental risks associated with conventional fracking methods. By utilizing high-voltage electricity and proprietary modeling techniques, Eden enhances rock permeability with precision, facilitating effective resource extraction across various geological settings. This technology not only reduces costs but also minimizes the negative impacts typically associated with hydraulic fracturing, positioning Eden as a leader in environmentally responsible resource recovery.

Arca is a leading carbon dioxide removal (CDR) company. Arca accelerates natural process of carbon mineralization, by reacting atmospheric carbon dioxide with ultramafic mine tailings rich in magnesium silicate minerals, such as serpentine and brucite. By leveraging partnerships with mining companies, Arca transforms mine waste into a carbon sink, permanently storing CO₂ as stable carbonate minerals. The company is at the forefront of scaling carbon dioxide removal (CDR) solutions by integrating geochemical expertise, real-time monitoring, and verification methodologies. Arca collaborates with major buyers of carbon removal credits, such as Shopify, Stripe, Watershed and MaRS, and has established formal methodologies for recognizing and quantifying mineralization in voluntary and compliance carbon markets.

Carboniferous is a company focused on developing anoxic biological carbon technology aimed at sequestering carbon from terrestrial biomass. Its innovative approach accelerates natural climate recovery by transferring excess biomass into anoxic zones, where decomposition is minimized, allowing for effective carbon storage. By leveraging existing supply chains, Carboniferous enables businesses to reduce their carbon footprint and enhance their sustainability efforts through the efficient management of biomass resources. The company’s technology represents a significant advancement in the quest to mitigate climate change by addressing the challenges associated with excess biomass and carbon emissions.

Canopy Farm Management specializes in agricultural services, focusing on tree planting and management. They cater to farmers and landowners, offering a comprehensive range of services including establishing perennial crops and timber plantings, implementing conservation practices, and integrating agroforestry systems. The company's expertise lies in providing skilled staff, thoughtful design, and modern farm equipment, enabling clients to create resilient, sustainable agroecological systems that enhance agricultural growth.

Travertine is a company focused on carbon dioxide removal and industrial chemical production, aiming to mitigate the environmental impact associated with the extraction of elements for renewable energy. Utilizing a proprietary electrochemical process, Travertine converts carbon dioxide from the atmosphere into mineral forms while simultaneously producing sulfuric acid, which is essential for critical element extraction and fertilizer production. The company effectively recycles sulfate wastes to generate sulfuric acid, thereby minimizing chemical waste during these processes. Additionally, Travertine generates high-quality carbon credits through its direct air capture and mineralization efforts, contributing to a sustainable approach in mining and fertilizer industries.

Heirloom is a company specializing in direct air capture technology aimed at enhancing the natural process of CO2 absorption from the atmosphere. Its innovative system accelerates limestone's ability to capture carbon dioxide, which is then stored permanently underground. The process operates using renewable energy, making it an environmentally friendly solution for carbon removal. Heirloom's technology is designed to capture and remove atmospheric CO2 at a gigaton scale, significantly reducing second-order impacts and minimizing extraction efforts. This approach allows clients to restore the atmosphere through natural processes, contributing to global efforts against climate change.

Running Tide is a global ocean health company that focuses on deploying nature-based interventions to remove carbon from the atmosphere and combat ocean acidification. The company utilizes adaptive aquaculture techniques to optimize marine environments while producing healthy, low-carbon protein. Running Tide employs advanced monitoring and measurement technology, leveraging photosynthesis, ocean currents, and gravity to store carbon in the deep ocean. By analyzing ocean data, the company aims to enhance the utilization of two-thirds of the Earth’s surface in the fight against climate change, ultimately improving the health of the world's oceans.

Arca is a leading carbon dioxide removal (CDR) company. Arca accelerates natural process of carbon mineralization, by reacting atmospheric carbon dioxide with ultramafic mine tailings rich in magnesium silicate minerals, such as serpentine and brucite. By leveraging partnerships with mining companies, Arca transforms mine waste into a carbon sink, permanently storing CO₂ as stable carbonate minerals. The company is at the forefront of scaling carbon dioxide removal (CDR) solutions by integrating geochemical expertise, real-time monitoring, and verification methodologies. Arca collaborates with major buyers of carbon removal credits, such as Shopify, Stripe, Watershed and MaRS, and has established formal methodologies for recognizing and quantifying mineralization in voluntary and compliance carbon markets.