Improved human greenspace exposure equality during 21st century urbanization

Shengbiao Wu, Bin Chen (), Chris Webster, Bing Xu and Peng Gong
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Shengbiao Wu: The University of Hong Kong
Bin Chen: The University of Hong Kong
Chris Webster: Urban Systems Institute, The University of Hong Kong
Bing Xu: Tsinghua University
Peng Gong: Urban Systems Institute, The University of Hong Kong

Nature Communications, 2023, vol. 14, issue 1, 1-11

Abstract: Abstract Greenspace plays a crucial role in urban ecosystems and has been recognized as a key factor in promoting sustainable and healthy city development. Recent studies have revealed a growing concern about urban greenspace exposure inequality; however, the extent to which urbanization affects human exposure to greenspace and associated inequalities over time remains unclear. Here, we incorporate a Landsat-based 30-meter time-series greenspace mapping and a population-weighted exposure framework to quantify the changes in human exposure to greenspace and associated equality (rather than equity) for 1028 global cities from 2000 to 2018. Results show a substantial increase in physical greenspace coverage and an improvement in human exposure to urban greenspace, leading to a reduction in greenspace exposure inequality over the past two decades. Nevertheless, we observe a contrast in the rate of reduction in greenspace exposure inequality between cities in the Global South and North, with a faster rate of reduction in the Global South, nearly four times that of the Global North. These findings provide valuable insights into the impact of urbanization on urban nature and environmental inequality change and can help inform future city greening efforts.

Date: 2023
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DOI: 10.1038/s41467-023-41620-z

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