A British company has claimed that the production and use of toilet paper is responsible for 15% of deforestation globally. We investigate the claim and ask what the true environmental cost of toilet paper is. Charlotte McDonald talks to climate change scientist Professor Mary Gagen, chief adviser on forests to the World Wide Fund for Nature, the WWF.Presenter: Charlotte McDonaldProducer: Louise Hidalgo and Jon BithreyEditor: Richard VadonProduction Coordinator: Helena Warwick-CrossStudio Engineer: Rod Farquhar