Sequoia sempervirens (IMAGE) The University of Hong Kong Caption Old-growth trees, such as redwoods (Sequoia sempervirens) in California, play a major role in global carbon sequestration. Credit Dr Jinbao Li Usage Restrictions N/A 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.