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But climate change is not the only global environmental threat that demands attention. Scientists widely agree that loss of wildlife and the natural environment is an equally urgent crisis. Some argue that biodiversity loss threatens to become Earth’s sixth mass extinction. But unlike efforts to fight climate change – which center on clear, measurable goals to reduce greenhouse gas emissions – there is no globally accepted metric for saving biodiversity.
As an expert on budgeting and public finance, I know that governments and private businesses alike pay much more attention to resources when they have a well-defined price tag. I believe that overhauling society’s concept of wealth to include “natural capital” – the value nature provides to humans – is a critical step for slowing and reversing the loss of precious ecosystems.
Natural capital can be defined as the world’s stocks of natural assets – soil, air, water, grasslands, forests, wetlands, rocks, and minerals – and all of its living things, from mammals and fish to plants and microbes. Conservation experts estimate that these resources contribute more than US$125 trillion to the global economy every year.
But human societies don’t formally recognize the economic value of these services. This oversight encourages people to recklessly deplete the natural environment.
A recent review of the economics of biodiversity, commissioned by the U.K. government and led by Cambridge University economist Sir Parth Dasgupta, warns that human prosperity is growing at a “devastating cost to nature” and estimates that it would take 1.6 Earths to maintain the world’s current living standards. The report calls for the world to treat nature as an asset to be reported in financial statements and national accounts.
The Capitals Coalition, a global consortium of 380 initiatives and businesses, is trying to “change the math.” The organization seeks to persuade at least half of the world’s businesses, financial institutions, and governments to incorporate natural capital into their decision-making by 2030.
Current accounting methods used by corporations and governments largely ignore what ecosystems and their services contribute to the economy and to human social well-being, jobs and livelihoods. As a consequence, modern societies spend far more on investments that deplete or exploit natural assets than they do to preserve them.
Under the current model, short-term economic gains typically win out against longer-term ecological benefits. For example, failing to maintain forests can spark wildfires. And constructing homes on fragile coastal wetlands can erode soil and reduce fish stocks, destroying local communities.
A recent study by the Paulson Institute, a research institute founded by former U.S. Treasury Secretary Henry Paulson, estimated that global investments that degrade nature exceed conservation efforts by $600 billion to $824 billion per year.
Natural capital accounting would require businesses and governments to calculate how human activity affects nature, much as they assess the depreciation of buildings or machinery. Analyzed in this way, nature is a financial asset, and damage to it becomes a liability. This approach creates incentives to conserve natural resources and restore others that have been degraded or depleted.
Global recognition of this issue is growing. In March 2021 the United Nations updated a statistical framework for standardizing ecosystem accounting, which was first published in 2012. These guidelines help countries track changes in ecosystems and their services and provide leaders with a baseline with which to compare their stocks and flows when making policy decisions.
Some 90 countries have adopted this System of Environmental Economic Accounting and produced baseline “national capital accounts.” They include European Union members, Australia, Canada, the United Kingdom, and more than 40 developing countries. The U.S. is planning to implement this approach but has not done so yet.
Placing values on natural assets is really no different from government assessments of the benefits of new roads, bridges, and other infrastructure. People intuitively understand that natural resources are precious. And the COVID-19 pandemic has made clear how closely human health is intertwined with the health of the planet.
In contrast, the U.K. created public environmental accounts and set up a Natural Capital Committee in 2012, led by its finance ministry, to help corporations develop natural capital accounts. Today, the U.K. maintains these accounts, which capture data on the size, condition, quantity, and value of habitats and ecosystem services. President Biden could empower the U.S. Treasury Department to spearhead a similar initiative.
Adopting metrics to measure and track the benefits people receive from wildlife and ecosystems would clarify how human activities affect nature and show how much investment is needed to reverse humanity’s current destructive trajectory. Conservation advocates will be much better positioned to protect our planet’s resources with a strong balance sheet to back it up.
Linda J. Bilmes is the Daniel Patrick Moynihan Senior Lecturer in Public Policy and Public Finance, Harvard Kennedy School. She was a member of the National Parks Second Century Commission and served on the U.S. National Parks Service Advisory Board for eight years.
This op/ed first appeared in The Conversation and is reprinted here with the author’s permission.
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