"Agriculture can do more than just focus on production," says Bob Watson, director of the International Assessment of Agricultural Science and Technology for Development (IAASTD), the project that he hopes will change agriculture forever when the final draft of its report is published on 15 April. "Farming can help supply clean water, it can help to protect biodiversity, and it should be managed in a way that manages our soils sustainably," says Watson, who used to be head of the Intergovernmental Panel on Climate Change (IPCC).