Environmental Chambers (IMAGE) U.S. National Science Foundation Caption Environmental chambers in early morning light in the Yukon-Kuskokwim Delta in western Alaska. Credit Ryan Choi, NSF 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.