Criticality Assessment of All Metals (image) Yale School of Forestry & Environmental Studies Share Print E-Mail Caption In this three-dimensional graphic, researchers illustrate the "criticality" of all 62 metals based on their scores in three areas: supply risk, environmental implications, and vulnerability to supply restrictions. Metals (some of which are indicated by their chemical symbols) with the higher levels of risk appear in the upper back right corner of the box. Credit Thomas Graedel, et al Usage Restrictions None Share Print E-Mail 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.