Methane reactor (IMAGE) University of Copenhagen - Faculty of Science Caption A look inside the MEPS reactor (Methane Eradication Photochemical System), where chlorine atoms are formed by UV light and react with methane gas. Photo: Morten Krogsbøll. Credit Photo: Morten Krogsbøll. Usage Restrictions Use with credit. 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.