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Future global urban water scarcity and potential solutions
Urbanization and climate change are together exacerbating water scarcity—where water demand exceeds availability—for the world’s cities. We quantify global urban water scarcity in 2016 and 2050 under four socioeconomic and climate change scenarios, and explored potential solutions. Here we show the...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8333427/ https://www.ncbi.nlm.nih.gov/pubmed/34344898 http://dx.doi.org/10.1038/s41467-021-25026-3 |
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author | He, Chunyang Liu, Zhifeng Wu, Jianguo Pan, Xinhao Fang, Zihang Li, Jingwei Bryan, Brett A. |
author_facet | He, Chunyang Liu, Zhifeng Wu, Jianguo Pan, Xinhao Fang, Zihang Li, Jingwei Bryan, Brett A. |
author_sort | He, Chunyang |
collection | PubMed |
description | Urbanization and climate change are together exacerbating water scarcity—where water demand exceeds availability—for the world’s cities. We quantify global urban water scarcity in 2016 and 2050 under four socioeconomic and climate change scenarios, and explored potential solutions. Here we show the global urban population facing water scarcity is projected to increase from 933 million (one third of global urban population) in 2016 to 1.693–2.373 billion people (one third to nearly half of global urban population) in 2050, with India projected to be most severely affected in terms of growth in water-scarce urban population (increase of 153–422 million people). The number of large cities exposed to water scarcity is projected to increase from 193 to 193–284, including 10–20 megacities. More than two thirds of water-scarce cities can relieve water scarcity by infrastructure investment, but the potentially significant environmental trade-offs associated with large-scale water scarcity solutions must be guarded against. |
format | Online Article Text |
id | pubmed-8333427 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-83334272021-08-12 Future global urban water scarcity and potential solutions He, Chunyang Liu, Zhifeng Wu, Jianguo Pan, Xinhao Fang, Zihang Li, Jingwei Bryan, Brett A. Nat Commun Article Urbanization and climate change are together exacerbating water scarcity—where water demand exceeds availability—for the world’s cities. We quantify global urban water scarcity in 2016 and 2050 under four socioeconomic and climate change scenarios, and explored potential solutions. Here we show the global urban population facing water scarcity is projected to increase from 933 million (one third of global urban population) in 2016 to 1.693–2.373 billion people (one third to nearly half of global urban population) in 2050, with India projected to be most severely affected in terms of growth in water-scarce urban population (increase of 153–422 million people). The number of large cities exposed to water scarcity is projected to increase from 193 to 193–284, including 10–20 megacities. More than two thirds of water-scarce cities can relieve water scarcity by infrastructure investment, but the potentially significant environmental trade-offs associated with large-scale water scarcity solutions must be guarded against. Nature Publishing Group UK 2021-08-03 /pmc/articles/PMC8333427/ /pubmed/34344898 http://dx.doi.org/10.1038/s41467-021-25026-3 Text en © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article He, Chunyang Liu, Zhifeng Wu, Jianguo Pan, Xinhao Fang, Zihang Li, Jingwei Bryan, Brett A. Future global urban water scarcity and potential solutions |
title | Future global urban water scarcity and potential solutions |
title_full | Future global urban water scarcity and potential solutions |
title_fullStr | Future global urban water scarcity and potential solutions |
title_full_unstemmed | Future global urban water scarcity and potential solutions |
title_short | Future global urban water scarcity and potential solutions |
title_sort | future global urban water scarcity and potential solutions |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8333427/ https://www.ncbi.nlm.nih.gov/pubmed/34344898 http://dx.doi.org/10.1038/s41467-021-25026-3 |
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