GIULIO BOCCALETTI is a globally recognized expert on natural resource security and environmental sustainability. He is an honorary research associate at the Smith School of Enterprise and the Environment, University of Oxford. Trained as a physicist and climate scientist, he holds a doctorate from Princeton University, where he was a NASA Earth Systems Science Fellow. He has been a research scientist at MIT and was a partner at McKinsey & Company, where he was one of the leaders of its Sustainability and Resource Productivity Practice, and the chief strategy officer and global ambassador for water at The Nature Conservancy, one of the world's largest environmental organizations. Boccaletti frequently writes on environmental issues for the news media, including Project Syndicate and The Guardian, and is an expert contributor to the World Economic Forum. His work on water has been featured in the PBS documentary series H2O: The Molecule That Made Us. He lives in London.