SPRUCE (IMAGE) DOE/Oak Ridge National Laboratory Caption By controlling the temperature and the amount of carbon dioxide in the test chambers, scientists hope to learn how microbial communities, moss populations, various higher plant types and some insect groups respond. Credit ORNL 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.