John C. Ayers is a Professor of Earth and Environmental Sciences at Vanderbilt University. As a geochemist he specializes in sustainability and also the chemistry of natural waters. He has been PI on 5 and co-Pi on 2 grants from the National Science Foundation, and has a publication h-index of 14. He has been Associate editor of American Mineralogist and Geochemical Transactions of the American Chemical Society, and does GIS consulting for the ERS group. He is currently writing a book titled " Sustainability: The Problems of Peak Oil, Global Climate Change, and Environmental Degradation."