Global distribution of WUIs (IMAGE) The University of Hong Kong Caption Global distribution of WUIs. (a) Geographic distribution of global WUI areas, (b) zoomed-in subsets of intermix WUI and interface WUI areas and (c) global urban areas overlaid on high-resolution satellite imagery across different continents in 2020. Credit The University of Hong Kong Usage Restrictions N/A 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.