Professor Cath Noakes (IMAGE) University of Leeds Caption Professor Noakes stands by the side of the ducting in a ventilation system of a large building Credit Jude Palmer/Royal Academy of Engineering 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.