Nature provides the conditions for a healthy, secure, and fulfilling existence. Among the many benefits people receive from nature are fresh water, food, protection from floods, and spiritual enrichment. It is hard to think of a development or investment decision that doesn’t in some way depend upon and affect nature.
The path-breaking Millennium Ecosystem Assessment has taken the first-ever comprehensive look at the condition of and trends in natural systems and the services they supply. It presents a stark account of the mismanagement of these services. Of the 24 assessed, only four have shown improvement over the past 50 years. A startling 15 are in serious decline. Five hang in the balance. But we don’t have to continue down this path. Using the Assessment as its backdrop, Restoring Nature’s Capital proposes an action agenda for business, governments, and civil society to reverse ecosystem degradation.
The authors, Frances Irwin and Janet Ranganathan, liken the Assessment to an audit – an audit of Planet Earth Ltd. In that light, ecosystems are less an array of elements – lands, waters, forests, reefs – that must be protected from harm, than they are huge capital assets, a trust fund perhaps. If properly managed using the action agenda suggested in this publication, this trust fund will provide benefits and income – economic and social – which will sustain generations to come.
If it is helpful to consider our natural resource base as capital assets, it is fair to say that the Assessment demonstrates that humanity has been squandering these assets at a quickening pace. In fact, we have treated many of these assets as if they had no value. The people who clear forests for agriculture, build dams for water retention or power, or replace mangroves with coastal development and shrimp farms generally benefit from those changes, but society at large pays significant costs associated with the loss of nature’s economic, cultural, or intrinsic values. No one in the private sector, or the public sector for that matter, would keep his or her job with a record of financial mismanagement and waste that the Assessment documents for our natural assets.
Unfortunately, national accounting systems have not done a good job of keeping track of natural assets. Economists have been preoccupied with a narrow set of economic indicators, such as gross domestic product, disposable income, and purchasing power parity. Many of nature’s services are not included in the accounts. The recent failure of businesses such as Enron should serve as a painful reminder of the potential consequences of keeping key assets and liabilities off the balance sheet.
The Assessment offers public and private sector decisionmakers a new way of seeing and valuing ecosystems from the perspective of nature’s services. In doing so, the Assessment confronts the status quo in uncomfortable but necessary ways. It forces us to acknowledge what we should have known all along – that ecosystems are a source of extraordinary wealth and value.
- Ecosystems supply provisioning services: food, water, and the wealth of materials that underpin all life on this earth. These services are perhaps the ones most easily understood and currently valued the most.
- Ecosystems provide regulating services: water filtration and purification, storm protection (barrier islands, wetlands, and reefs, for example), pollination, erosion control, and carbon sequestration. Although we are learning about these services, our ignorance of them and of their enormous economic value remains profound.
- Ecosystems offer cultural services. Recreation is the most obvious; but as important are the spiritual and aesthetic values that many find in nature.
- Ecosystems also provide supporting services such as soil formation, photosynthesis, nutrient cycling, and water cycling. These underlie all of the other services.




