Glass Beads (IMAGE) American Chemical Society Caption A study using glass beads to collect grime (above) shows that compounds can recycle from grime back into the air and contribute to pollution. Credit Alyson Baergen Usage Restrictions Please credit Alyson Baergen when using this image. 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.