Scatterplot of GBGI cooling efficiency (IMAGE) The Hong Kong Polytechnic University Caption Scatterplot of GBGI cooling efficiency in different climate zones and against population density (A), area of city (B), ratio: area of GBGI/area of city (C), altitude (D), and temporal scale of cooling (E). Credit © 2024 Research and Innovation Office, The Hong Kong Polytechnic University. All Rights Reserved. Usage Restrictions Nil License Original 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.