Peter Olsén and Céline Montanari (IMAGE) KTH, Royal Institute of Technology Caption Peter Olsén and Céline Montanari,researchers in the Department of Biocomposites at KTH Royal Institute of Technology in Stockholm, have developed a wood composite that uses components of lemon and coconuts to both heat and cool homes. Credit David Callahan Usage Restrictions Credit must be given to the creator. License CC BY 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.