Eco-engineered tiles before deployment and after 12 months (image) City University of Hong Kong Share Print E-Mail Caption Eco-engineered tiles before deployment (left) and after 12 months (right). More species like snails are found on the tiles after 1 year. Credit City University of Hong Kong Usage Restrictions Image must only be used with appropriate caption and credit. 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.