Key Takeaways
Achieving Net-Zero requires deploying high-integrity carbon removal solutions to neutralize residual emissions. By combining nature-based projects (reforestation, soil sequestration) with technological and hybrid innovations (DAC, BECCS, Biochar), organizations can secure permanent carbon storage and deliver measurable climate impact.
As the global efforts to combat climate change intensify, carbon dioxide removal (CDR) methods and projects are diversifying, spanning from harnessing the power of natural ecosystems to employing cutting-edge carbon engineering solutions that are in line with the Intergovernmental Panel on Climate Change (IPCC). Understanding different CDR methods and how they span across the Voluntary Carbon Market (VCM) is pivotal to shaping effective climate action plans in the race to reach net-zero emissions.
This guide delves into the three major CDR methods: Nature-based Solutions, Hybrid Solutions, and Engineered Solutions, providing a comprehensive overview of the key characteristics of each and how they compare in the market. Together, they weave a complex tapestry of solutions that could play pivotal roles in achieving climate targets and fostering a sustainable future.
At ClimateSeed, we maximize positive environmental and social impacts by providing climate solutions to support meaningful carbon removal projects, leveraging the pivotal and necessary financing mechanisms of the VCM.
Nature-based Solutions (NbS) are projects that leverage natural processes —such as photosynthesis or soil carbon sequestration— to remove and store carbon dioxide from the atmosphere.
NbS solutions include projects involving reforestation, agriculture, mangroves, seagrass, and seaweed farming among others.
Hybrid solutions combine natural processes with human interventions and technological advancements. These projects recognize the complementary nature of ecological and technological interventions to maximize CO₂ removal opportunities.
Hybrid solutions include projects involving biochar, enhanced rock weathering, carbonated materials, and woody biomass.
Engineered solutions involve advanced technologies to directly capture and store carbon dioxide from the atmosphere. It involves human-made technologies that focus on mitigating emissions directly, rather than relying on natural ecosystems or processes.
Engineered solutions can be categorized into carbon capture and utilization (CCU) technologies, and carbon capture and storage (CCS) technologies. While they both focus on removing carbon, the end goals can differ. CCU technologies focus on end-use applications of removed carbon as raw material (construction materials, production of chemicals, biofuels, etc.) CCS technologies focus on storing carbon in geological formations to prevent their release into the atmosphere.
Engineered solutions include Direct Air Capture (DAC) systems and Bioenergy with Carbon Capture and Storage (BECCS). If you're interested in adding any of these project typologies to your carbon project portfolio, please contact us.
One way to compare CDR methods is by looking at both the internal attributes of each and the external market environment in which they operate.
Table one serves as an internal lens, delving into some intrinsic attributes of each type of carbon removal method. Internal attributes explore elements like project size potential, implementation feasibility, cost, co-benefits, and the crucial dimension of permanence. This internal examination provides a nuanced understanding of the internal efficacy, on-the-ground applicability, and potential to achieve Sustainable Development Goals (SDGs) beyond just carbon removal.
| Nature-based Solutions (NbS) | Hybrid Solutions | Engineered Solutions (ES) | |
| Project size |
Higher The size of nature-based projects can range from local initiatives, such as community reforestation projects, to large-scale efforts involving expansive land areas. |
Small to large Can range from local applications to larger initiatives as demand for projects drives scale in production.
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Moderate to large Direct Air Capture (DAC) facilities can range from pilot projects to industrial installations. Bioenergy with Carbon Capture and Storage (BECCS) can be integrated with large-scale energy production. |
| Implementation |
Feasible Implementation of NbS can vary from community-led projects which require coordination to government-driven initiatives. The successful deployment often depends on local ecological conditions, community involvement, and policy support. |
Variable Implementation varies based on technology, scale, and local conditions. |
Challenging Requires substantial technological infrastructure, investment, and policy support. Barriers can include large initial capital costs, mastery technology, and economies of scale. |
| Co-benefits & SDG impacts |
Higher NbS projects have the largest positive impacts spanning from social to environmental, due to their inextricable link to land and the communities that depend on its multiple ecosystem services.
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Variable When implemented thoughtfully, hybrid projects such as biochar can offer a range of co-benefits that extend beyond carbon removal.
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Lower While engineered solutions may have limited co-benefits when compared to NbS, they offer potential co-benefits and contributions to broader sustainability goals.
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| Permanence |
Lower NbS provide relative permanent carbon removal, with a higher risk of reversal compared to hybrid and engineered solutions. Projects are somewhat more vulnerable to climate-related hazards like fire and drought which can impact long term permanence. |
Variable Permanence depends on the technology and application. Generally considered relatively stable (e.g., biochar in soils). |
Higher Achieves relatively high permanence, especially with secure CO2 storage in geological formations. |
| Implementation cost |
Lower NbS are considered cost-effective, particularly when implemented at scale. |
Medium Cost vary by technology, scale, and local factors. Generally considered cost-effective at scale (e.g., biochar). |
Higher Upfront costs are often substantial due to technological and infrastructure requirements. Economics influenced by scale, efficiency, and policy incentives. |
Table two presents another way to compare CDR methods, considering elements of the market in which they operate such as credit volume potential, market readiness and maturity, and pricing dynamics. This external comparison provides insights in terms of the viability and scalability of these methods and their adaptability to the broader market landscape in light of demand.
| Nature-based Solutions (NbS) | Hybrid Solutions | Engineered Solutions (ES) | |
| Credit Volume |
Higher NbS have significant potential in terms of volume due to its scalability. Reforestation projects, for instance, can remove substantial amounts of carbon over vast areas. |
Variable Tends to be smaller compared to NbS but can vary based on technology and scale, reaching higher volumes. |
Smaller The potential for credit volume is significant and influenced by factors such as the scale of deployment, technology efficiency, and storage security. |
| Market readiness/maturity | NbS follow the same natural processes that the earth has relied on for millennia thus making them the most understood, and long-lived method for carbon removal. NbS projects are relatively mature, with established practices in afforestation, reforestation, and sustainable agriculture. | Some technologies like biochar are more mature in terms of market readiness, while others are in earlier stages in comparison (e.g., enhanced rock weathering). | Engineered applications are hindered by very high costs and while the technology is advancing, deployment remains in early stages. |
| Price | €15-€70 | €100-€600 | €160-€1,600 |
For more information on carbon removal methods, feel free to contact our carbon project experts at project@climateseed.com.