India is today expected to become the first country in the world to commit to publishing a new set of accounts which track the nation's plants, animals, water and other "natural wealth" as well as financial measurements such as GDP.
The announcement is due to be made at , and it is hoped that such a move by a major developing economy will prompt other countries to join the initiative.
Work on agreeing common measures, such as the value of ecosystems and their "services" for humans – from relaxation to clean air and fertile soils – will be co-ordinated by the World Bank, which hopes it can sign up 10-12 nations and publish the results by 2015 at the latest.
The move fulfils one of the key demands of a major report also being published today at the Japan meeting, a UN study of .
The report was commissioned by the G8+5 major nations in 2007 in the hope of repeating the success of Lord Stern's report on in persuading governments of the strong economic case to take action on saving the natural world.
The environment secretary, Caroline Spelman, welcomed the report: "TEEB can have the same impact for biodiversity as Stern had for climate change and will be a useful tool to help reduce the loss of species and habitats ... economically, we have to take action to reduce the loss of our natural environment before the cost becomes too high."
Pavan Sukhdev, economist and the TEEB study leader said: "Natural capital is a massive asset class, and developing nations' biggest asset. For it to be missing from the balance sheet of the nation, or for failures not to be counted, does not make sense."
After India and the other countries that join it in the first ecosystem accounts, Sukhdev said he hoped another 20-30 would adopt the system over the following three to five years.
"The rest: if they are not with it, people will get left behind," he added. "We'll never have all 192 countries, but does that matter? The idea is to establish the direction in which national accounting must go."
After the publication over the past two years of an interim report and specific documents about the economics and recommended actions by governments, businesses and , Teeb will today publish its final "synthesis" report.
This will not contain a specific headline value for all the world's biodiversity, although earlier versions have quoted huge values for individual ecosystems such as forests, and Sukhdev today talks of .
However it argues that there is plenty of evidence for national and local governments, businesses and individuals to radically review how they make decisions to take into account the damage or preservation of biodiversity.
"Teeb's approach can reset the economic compass," says Sukhdev. "Do nothing, and not only do we lose trillions of dollars' worth of current and future benefits to society, we also further impoverish the poor and put future generations at risk. The time for ignoring biodiversity and persisting with conventional thinking regarding wealth creation and development is over. We must get on to the path towards a green economy."
Among the report's recommendations are that countries and companies should publish accounts of their natural capital, and how much it has increased or decreased over the previous year, in parallel with traditional financial accounts. This should help address current accounting rules which, for example, measure the clean up of a pollution spill as an increase in economic activity (by the clean up companies), but take no account of the long-term damage done.