Conversation: The Intergovernmental Panel on Climate Changes (IPCC) Impacts volume of the Fifth Assessment Report will be released today. Here, three contributors to the health chapter explain the ideas and evidence behind the report. The consequences of human-driven global climate change as this century progresses will be wide-ranging. Yet public discussion has focused narrowly on a largely spurious debate about the basic science and on the risks to property, iconic species and ecosystems, jobs, the GDP and...