Natural capital is the term used to put an economic value on nature's goods and services. A panel of leading experts chaired by Richard Black, the BBC's environment correspondent, discussed the issues at a live debate at the Natural History Museum on 22 February 2012. For more information www.nhm.ac.uk/nature-online/biodiversity/earth-debates/ and join the debate. The panel Emily Benson, a project manager for the Green Economy Coalition Hannah Ryder, a senior UK government economist in the Department for International Development advising on low-carbon and climate-resilient economic growth in developing countries Andrew Simms, author and Fellow of the New Economics Foundation Paul Simpson, co-founder and Chief Executive Officer of the Carbon Disclosure Project