What is the value of a peat bog?

Business leaders and environmentalists are gathering at the first World Forum on Natural Capital in Edinburgh.

The event, organised by the Scottish Wildlife Trust in partnership with the UN and other organisations, aims to develop ways of putting an economic value on nature in an effort to conserve it.

Using the example of a peat bog, Jonathan Hughes, director of conservation at the Scottish Wildlife Trust, explains the concept to the BBC's Claire Marshall.