Valgepea_autor Andres Tennus.jpg (IMAGE) Estonian Research Council Caption Kaspar Valgepea, Associate Professor of Gas Fermentation Technologies at the University of Tartu Credit credit to the author Andres Tennus Usage Restrictions Please use the photos with credits License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.