Epidemiology : science as a tool to inform one health policy / Yvette Johnson-Walker, John Kaneene -- Health impacts in a changing climate / Donald J. Wuebbles -- Food safety and security / Megin Nichols, Lauren Stevenson, Casey Barton Behravesh, Robert Tauxe -- Water security in a changing world / Jeffrey M. Levengood, Ari Hörman, Marja-Liisa Hänninen, Kevin O'Brien -- One toxicology, one health, one planet / Daniel Hryhorczuk, Val R. Beasley, Robert Poppenga, Timur Durani -- Biodiversity and health / Dominic A. Travis [and 8 others] -- Emerging infectious diseases : old nemesis, new challenges / Ronald C. Hershow, Kenneth E. Nusbaum -- Companion animals and health / Sandi LeFebvre, Robert V. Ellis -- Zoological institutions and one health / Thomas Meehan, Yvonne Nadler -- Health leadership and policy / William D. Hueston, Innocent B. Rwego, Ed G.M. van Klink -- Implementing one health / Laura Kahn -- The social cost of carbon / William J. Craven -- Complex problems, progressive policy solutions and one health / John A. Herrmann -- The long and winding road / John A. Herrmann, Yvette Johnson-Walker.