Dina L. Lopez, Ph.D, is currently an associate professor at Ohio University in Athens, Ohio, USA. Her research interests include the geochemistry and hydrogeology of geothermal systems, including diffuse soil degassing and heat flow studies. Areas of research are located in Central America (Costa Rica and El Salvador), and in Tenerife, Canary Islands, Spain. Dr. Lopez is also interested in environmental problems associated to mining and resource exploitation. Within Ohio, she investigates the chemistry, fluid flow, and mass transfer associated with acid mine drainage from coal mines.