Wenzhong Zhang, University of Helsinki (IMAGE) University of Helsinki Caption Wenzhong Zhang is an environmentalist from the University of Helsinki, who in his doctoral thesis in the field of chemistry describes a method for capturing small quantities of rare-earth elements from the waste heaps of the aluminium industry. Credit Riitta-Leena Inki 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.