Sao Paulo, one of the largest cities in the world, may run out of water in the next few months leaving 20 million people high and dry. Who is to blame? Incompetent politicians, unpredictable weather patterns or the wholesale destruction of Amazonia’s rainforests? Join us for the second in a series of events held in partnership with The Scientific Exploration Society, as we bring together explorers, scientists and journalists to examine the water shortage in Brazil and debate the wider questions about global water security.