Crystals that Clean Natural Gas (1 of 2) (IMAGE) King Abdullah University of Science & Technology (KAUST) Caption Once stripped of contaminants, natural gas burns much more cleanly that other fossil fuels. Credit © Yevhen Tarnavskyi/ Shutterstock, Inc. Usage Restrictions None License Licensed 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.