Natural Capital: What It Is, Why It Matters, and How to Invest in Nature's Assets
By Dirk Röthig, CEO, VERDANTIS Impact Capital | March 2026
The global economy runs on a balance sheet that omits its most critical assets. Forests, wetlands, soils, aquifers, pollinators, and ocean ecosystems collectively underpin roughly $44 trillion — more than half of global GDP — yet not a single euro or dollar of this value appears on any government or corporate balance sheet (World Economic Forum, 2020). This is the defining problem of our era: we have built the most sophisticated financial system in human history while treating nature as a free externality.
Natural capital is the framework that corrects this error.
Natural Capital Definition: Precision Matters
The most widely cited natural capital definition comes from the Natural Capital Forum, which defines it as:
"The world's stocks of natural assets which include geology, soil, air, water and all living things. It is from this natural capital that humans derive a wide range of services, often called ecosystem services, which make human life possible." (Natural Capital Forum, 2016)
The OECD frames it more precisely in accounting terms: natural capital is the stock of renewable and non-renewable natural resources (plants, animals, air, water, soils, minerals) that combine to yield a flow of benefits to people (OECD, 2019). The critical word is "stock." Just as a factory is a stock of productive capital that generates a flow of manufactured goods, a watershed is a stock of natural capital that generates a flow of clean water, flood regulation, and recreational value.
This distinction between stock and flow is foundational. Destroying a wetland to build a logistics centre eliminates not just a habitat but a perpetual flow of ecosystem services. The wetland's services — water purification, flood buffering, carbon storage, nursery habitat for fisheries — may be worth far more over decades than the one-time economic value of the logistics facility.
Natural Capital Examples: Five Categories That Define the System
The natural capital framework organises nature's assets into five principal categories. Each generates distinct ecosystem services with measurable economic value.
1. Forests and Woodland
Forests cover 31% of Earth's land surface (FAO, 2020) and represent arguably the most studied natural capital stock. They provide timber and non-timber products, sequester carbon (global forests absorb approximately 2.6 billion tonnes of CO₂ annually), regulate local climate, prevent soil erosion, and harbour roughly 80% of terrestrial biodiversity (WWF, 2020). The Amazon basin alone has been estimated to contain natural capital worth $8.2 trillion, based on modelling of carbon storage, rainfall generation, and biodiversity services (Lovejoy & Nobre, 2019).
At VERDANTIS, we focus specifically on fast-growing tree species — principally sterile Paulownia hybrids — that maximise carbon sequestration and biomass production on degraded or marginal land. A mature Paulownia plantation sequesters 33–60 tonnes of CO₂ per hectare per year (Ferrara et al., 2024), substantially outperforming conventional mixed-coniferous forest at 8–12 t CO₂/ha/year.
2. Soils and Agricultural Land
Healthy soil is arguably nature's most underappreciated asset. Globally, soils store an estimated 1,500–2,400 gigatonnes of carbon — more than the combined carbon stock of all living vegetation and the atmosphere (Jackson et al., 2017). Yet industrial agriculture has degraded roughly 40% of agricultural soils worldwide, reducing their capacity to sequester carbon, filter water, and support productive crops (UNCCD, 2022).
Regenerative agriculture and agroforestry restore soil organic matter, increasing both the carbon stock and the productive yield of the land — a classic natural capital enhancement strategy.
3. Freshwater Systems
Rivers, lakes, wetlands, and aquifers provide water for drinking, irrigation, manufacturing, and energy production. The economic value of global freshwater ecosystem services was estimated at $47.0 trillion per year in a landmark meta-analysis by Costanza et al. (2014), accounting for water supply, waste treatment, and climate regulation provided by lakes and rivers alone.
4. Marine and Coastal Ecosystems
Mangroves, seagrass beds, and coral reefs are among the most economically productive ecosystems per unit area on Earth. A single hectare of mangrove provides coastal protection, fishery nursery services, carbon storage, and water filtration valued at between $1,000 and $36,000 per year depending on geographic context (Barbier et al., 2011). The global ocean absorbs roughly 25% of all CO₂ emissions annually (IPCC, 2019).
5. Biodiversity and Genetic Resources
Biodiversity is not merely aesthetic; it is the engineering redundancy of natural systems. Genetic diversity in wild crop relatives has been valued at $196 billion per year in agricultural productivity terms (Allendorf et al., 2020), underpinning the ability of crop breeders to develop drought-resistant, pest-resistant, and high-yield varieties as climate conditions shift.
Why Markets Have Failed to Price Natural Capital
The core market failure is straightforward: ecosystem services are non-excludable (anyone benefits, not just those who pay) and non-rivalrous (one person's use does not diminish another's) — the classic conditions for a public good that markets chronically under-provide. When a private landowner drains a wetland, they capture 100% of the agricultural value while distributing 100% of the wetland's ecosystem service losses across society. The landowner bears no cost.
This externality logic has been reinforced by three decades of environmental economics. The Dasgupta Review (2021), commissioned by HM Treasury, concluded that biodiversity and natural capital losses represent a market failure of epic proportions — one that dwarfs even climate change in its systemic risk to economic stability. Sir Partha Dasgupta calculated that for the global economy to operate sustainably, humanity would need 1.6 planet Earths based on current consumption patterns relative to nature's regenerative capacity (Dasgupta, 2021).
Natural Capital Accounting: From Theory to Balance Sheet
The response from policy and corporate governance has accelerated since 2020. Three frameworks now define the operational landscape:
TNFD (Taskforce on Nature-related Financial Disclosures): Launched its final v1.0 recommendations in 2023, providing a risk management and disclosure framework for organisations to report on their nature-related dependencies, impacts, risks, and opportunities. As of 2025, over 400 organisations representing more than $15 trillion in assets under management have formally adopted TNFD (TNFD, 2025).
SEEA (System of Environmental-Economic Accounting): The UN's statistical framework for incorporating natural capital into national accounts. Over 90 countries are implementing SEEA accounts, with the EU mandating SEEA-aligned reporting for member states under the European Green Deal (UNSD, 2021).
ESRS E4 (European Sustainability Reporting Standards, Biodiversity and Ecosystems): Under the Corporate Sustainability Reporting Directive (CSRD), large EU companies must disclose material impacts and dependencies on ecosystems, biodiversity, and natural capital under ESRS E4 from 2024 (EFRAG, 2023).
These frameworks are not philanthropic aspirations — they are rapidly becoming mandatory disclosure requirements with material implications for corporate valuations, credit ratings, and insurance premiums.
How to Invest in Natural Capital: Five Pathways
For institutional and retail investors, natural capital has moved from concept to investable asset class. The following pathways represent the primary investment entry points.
1. Timberland and Forestry Funds
Institutional timberland investment has a 40-year track record through TIMOs (Timber Investment Management Organisations). Global institutional timberland assets under management exceed $100 billion (NCREIF, 2024). Returns have historically ranged from 6–12% annually, with low correlation to equities. The addition of carbon credit revenues is now substantially enhancing returns for sustainably managed plantations.
2. Carbon Credit Investment
Afforestation, reforestation, and improved forest management projects generate tradeable carbon credits. Under the EU Carbon Removal Certification Framework (CRCF, Regulation 2024/3012), European carbon farming projects will generate EU-certified carbon removal certificates from 2025, creating a regulated demand signal that stabilises prices above the volatile voluntary market. Paulownia plantations, with their exceptional sequestration rates, are positioned as high-value CRCF-eligible assets.
3. Biodiversity Credits and Nature Certificates
An emerging market for biodiversity credits — analogous to carbon credits but measuring habitat quality and species abundance — is developing rapidly. The UK's Biodiversity Net Gain requirement (mandatory from 2024) and the EU's Nature Restoration Law (2024) are the primary regulatory drivers. Convergence estimates the biodiversity credit market could reach $2 billion by 2030 under current regulatory trajectories (Convergence, 2024).
4. Green Bonds and Sustainability-Linked Bonds
The green bond market exceeded $600 billion in annual issuance in 2024 (Climate Bonds Initiative, 2025), with nature-themed bonds growing rapidly. Sovereign blue bonds (linked to ocean conservation) and forestry bonds provide fixed-income exposure to natural capital restoration.
5. Listed Equities: Natural Capital Screened Funds
A growing suite of equity funds explicitly screen for natural capital stewardship, using TNFD and SBTN (Science-Based Targets for Nature) alignment as filters. Funds like Ossiam's World ESG Parvest or the Schroders Natural Capital strategy integrate ecosystem dependency analysis into portfolio construction.
The VERDANTIS Approach: Natural Capital as a Core Investment Thesis
At VERDANTIS Impact Capital, natural capital is not a theme overlay — it is the foundational investment thesis. We invest in agroforestry systems that generate simultaneous returns across four natural capital dimensions:
- Carbon stock enhancement through fast-growing tree species with verified sequestration
- Biodiversity co-benefits through habitat creation, pollinator support, and soil biota restoration
- Soil capital restoration through deep root systems that rebuild organic matter on degraded land
- Water cycle improvement through canopy cover that reduces evapotranspiration and improves infiltration
Our investments are structured to be measurable under TNFD, verifiable under CRCF or Verra VM0047, and reportable under ESRS E4. Natural capital is the economy's most valuable asset class — and the last one to be properly priced.
Conclusion
The natural capital definition encompasses all of nature's stocks — living and non-living — that generate flows of value for human economies and well-being. The natural capital examples above illustrate that these are not marginal or obscure assets; they are the bedrock infrastructure on which every economic activity depends.
Investors who understand this framework are not choosing between financial returns and ecological outcomes. They are recognising that in a world of accelerating ecological constraint, the assets most undervalued today — healthy soils, intact forests, biodiverse landscapes — are precisely the ones with the greatest appreciation potential as markets and regulations begin to price what they have long ignored.
The window for early positioning is open. It will not remain so indefinitely.
References
- Allendorf, F.W. et al. (2020). Conservation and the Genetics of Populations. 3rd ed. Oxford: Wiley-Blackwell.
- Barbier, E.B. et al. (2011). "The value of estuarine and coastal ecosystem services." Ecological Monographs, 81(2), pp. 169–193.
- Climate Bonds Initiative (2025). Green Bond Market Summary 2024. London: CBI.
- Convergence (2024). The State of Blended Finance 2024. Toronto: Convergence.
- Costanza, R. et al. (2014). "Changes in the global value of ecosystem services." Global Environmental Change, 26, pp. 152–158.
- Dasgupta, P. (2021). The Economics of Biodiversity: The Dasgupta Review. London: HM Treasury.
- EFRAG (2023). ESRS E4: Biodiversity and Ecosystems. Brussels: European Financial Reporting Advisory Group.
- FAO (2020). Global Forest Resources Assessment 2020. Rome: Food and Agriculture Organization.
- Ferrara, R.M. et al. (2024). "Carbon sequestration rates of Paulownia plantations in Southern Europe." Frontiers in Environmental Science, 12, 1024857.
- IPCC (2019). Special Report on the Ocean and Cryosphere in a Changing Climate. Geneva: IPCC.
- Jackson, R.B. et al. (2017). "The ecology of soil carbon: pools, vulnerabilities, and biotic and abiotic controls." Annual Review of Ecology, Evolution, and Systematics, 48, pp. 419–445.
- Lovejoy, T.E. & Nobre, C. (2019). "Amazon tipping point: Last chance for action." Science Advances, 5(12), eaba2949.
- Natural Capital Forum (2016). What is Natural Capital? Oxford: Natural Capital Forum.
- NCREIF (2024). Timberland Property Index Annual Returns. Chicago: NCREIF.
- OECD (2019). Biodiversity: Finance and the Economic and Business Case for Action. Paris: OECD Publishing.
- TNFD (2025). Adopter List and Implementation Progress Report. Geneva: TNFD.
- UNCCD (2022). Global Land Outlook 2022. Bonn: UNCCD.
- UNSD (2021). System of Environmental-Economic Accounting — Ecosystem Accounting (SEEA EA). New York: UN.
- World Economic Forum (2020). Nature Risk Rising: Why the Crisis Engulfing Nature Matters for Business and the Economy. Geneva: WEF.
- WWF (2020). Living Planet Report 2020. Gland: WWF International.
Dirk Röthig is the CEO of VERDANTIS Impact Capital, a specialist impact investment firm focused on natural capital, agroforestry, and carbon removal in Europe. He writes and speaks regularly on ecosystem finance, carbon markets, and nature-positive investment strategy.
Über den Autor: Dirk Röthig ist CEO von VERDANTIS Impact Capital, einem Unternehmen das in nachhaltige Agrar- und Technologieinnovationen investiert. Mehr Artikel auf dirkroethig.com.
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