Closed Loop (IMAGE) Columbia Climate School Caption Engineers and scientists have designed a system to pump volcanic gases including carbon dioxide back into the earth, where the CO2 turns into a solid. Left to right, engineer Magnus Thor Arnarson, Lamont-Doherty Earth Observatory hydrologist Martin Stute and project leader Edda Sif Arradotir of Reykjavik Energy inspect the downgoing piping system. Credit Kevin Krajick/Lamont-Doherty Earth Observatory Usage Restrictions Credit must be given. 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.