3-5 June Summit , in Rome, on food security offers historic chance to address world food challenges. In the following interview, FAO's Assistant Director-General of the Natural Resources Management and Environment Department and Secretary of the High-Level Conference on World Food Security: the Challenges of Climate Change and Bioenergy, Mr Alexander Müller, gives us an overview of issues on the agenda and what FAO expects from the Summit's outcome. (Interview by Charmaine Wilkerson, FAO)