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Urban water and food security in this century and beyond: Resource-smart cities and residents
The urban world population will increase from 3 to 8.5 thousand million in the 21st century. Cities become hot spots of both demand for water and global food and for disposed used water and nutrients. Sustainability requires that resource flows through our cities are co-managed and connected to agri...
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Springer Netherlands
2020
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7882668/ https://www.ncbi.nlm.nih.gov/pubmed/33001342 http://dx.doi.org/10.1007/s13280-020-01373-1 |
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author | Drangert, Jan-Olof |
author_facet | Drangert, Jan-Olof |
author_sort | Drangert, Jan-Olof |
collection | PubMed |
description | The urban world population will increase from 3 to 8.5 thousand million in the 21st century. Cities become hot spots of both demand for water and global food and for disposed used water and nutrients. Sustainability requires that resource flows through our cities are co-managed and connected to agriculture. Reduced use of harmful chemicals in consumer products facilitates treatment to a quality that allows reuse/recycling of water and nutrients. A solid and liquid waste hierarchy can assist in ordering measures. A novel flexible water balance can guide city infrastructure and keep toilet water separate. New water-saving equipment can substantially reduce water use without losing personal comfort. The combination of these new approaches ascertains access to safe urban water, and that recovered nutrients from cities can substitute half of chemical fertilisers needed in food production. Now, thousands of new cities and suburbs provide unique opportunities to develop resource-smart and sustainable flows. |
format | Online Article Text |
id | pubmed-7882668 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Springer Netherlands |
record_format | MEDLINE/PubMed |
spelling | pubmed-78826682021-02-25 Urban water and food security in this century and beyond: Resource-smart cities and residents Drangert, Jan-Olof Ambio Perspective The urban world population will increase from 3 to 8.5 thousand million in the 21st century. Cities become hot spots of both demand for water and global food and for disposed used water and nutrients. Sustainability requires that resource flows through our cities are co-managed and connected to agriculture. Reduced use of harmful chemicals in consumer products facilitates treatment to a quality that allows reuse/recycling of water and nutrients. A solid and liquid waste hierarchy can assist in ordering measures. A novel flexible water balance can guide city infrastructure and keep toilet water separate. New water-saving equipment can substantially reduce water use without losing personal comfort. The combination of these new approaches ascertains access to safe urban water, and that recovered nutrients from cities can substitute half of chemical fertilisers needed in food production. Now, thousands of new cities and suburbs provide unique opportunities to develop resource-smart and sustainable flows. Springer Netherlands 2020-10-01 2021-03 /pmc/articles/PMC7882668/ /pubmed/33001342 http://dx.doi.org/10.1007/s13280-020-01373-1 Text en © The Author(s) 2020, corrected publication 2020 Open AccessThis 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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Perspective Drangert, Jan-Olof Urban water and food security in this century and beyond: Resource-smart cities and residents |
title | Urban water and food security in this century and beyond: Resource-smart cities and residents |
title_full | Urban water and food security in this century and beyond: Resource-smart cities and residents |
title_fullStr | Urban water and food security in this century and beyond: Resource-smart cities and residents |
title_full_unstemmed | Urban water and food security in this century and beyond: Resource-smart cities and residents |
title_short | Urban water and food security in this century and beyond: Resource-smart cities and residents |
title_sort | urban water and food security in this century and beyond: resource-smart cities and residents |
topic | Perspective |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7882668/ https://www.ncbi.nlm.nih.gov/pubmed/33001342 http://dx.doi.org/10.1007/s13280-020-01373-1 |
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