China's Pearl River Delta overtakes Tokyo as world's largest megacity | Cities | The Guardian
Temperature change and urbanisation in a multi-nucleated megacity: China's Pearl River Delta - ScienceDirect,Co-occurrence of ozone and PM2.5 pollution in the Yangtze River Delta over 2013–2019: Spatiotemporal distribution and meteorological conditions - ScienceDirect,China's Pearl River Delta overtakes Tokyo as world's largest megacity | Cities | The Guardian,これはアメリカの21の最も汚染された都市です。 | OilPrice.com