Polyurethane foam (IMAGE) Northwestern University Caption Polyurethane foams are notoriously difficult to recycle and end up in landfills or in lower value products, such as synthetic carpets. Credit Northwestern University 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.