Brake Abrasion Dust (IMAGE) UK Research and Innovation Caption Brake abrasion dust contains tiny particles rich in metals which can be inhaled into the deepest regions of the lung (photo taken by an electron microscope at 1,000 times magnification). Credit L. Selley University of Cambridge. Usage Restrictions Credit: L. Selley University of Cambridge. 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.