Business leaders and environmentalists say putting an economic value on nature could be the best way to save it.
Scottish First Minister Alex Salmond will be among those speaking at the first World Forum on Natural Capital in Edinburgh later.
The event has been organised by the Scottish Wildlife Trust in partnership with the UN and other organisations.
The concept of “natural capital” involves businesses calculating the economic value of nature.
This allows an assessment of companies’ financial impact on the environment. This data is used to make strategic decisions that conserve the natural raw materials they rely on, to ensure the future growth of the business.