Presentation Details
Halving nitrogen pollution with urbanization in China
ID：51
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Updated Time：2023-04-25 16:24:03
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Oral Presentation
Start Time：2023-05-08 08:10（Asia/Shanghai）
Duration：10min
Session：8A 8A、城市与区域地理 »
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Abstract
Halving nitrogen pollution is crucial for achieving global sustainable development goals (SDGs), with a substantial share of this pollution being directly linked to nitrogen use and losses1. However, how to reduce such a large share of nitrogen pollution from multiple sources synergistically remains a grand challenge2,3. China is currently the world’s largest user of nitrogen and experiencing the largest losses to the environment4. At the same time, it is undergoing the most rapid urbanization, with a population of about 14 million migrating from rural to urban settings each year5. Here we show that reactive nitrogen (Nr) pollution could be roughly halved as a consequence of urbanization in China by 2050, with emissions of NH3, NOx and N2O to air declining by 54%, 35% and 32%, respectively, and nitrogen runoff and leaching to water bodies by 46%. Urbanization moves population from rural to urban areas, which reduces non-point source pollution from rural sewage and agriculture through large-scale and crop-livestock coupled farming. Although rural-to-urban migration increases point-source nitrogen emissions in metropolitan areas, regional air and water quality are improved due to urbanization reduces the upstream and regional total nitrogen losses to the environment, and control of point source emissions vs. diffuse emissions is more efficient. Approximate US$ 53 billion would be required for additional urban waste treatment, agricultural land consolidation and livestock relocation, as well as upgrading industrial facilities. However, the overall benefits are calculated at US$ 250 billion due to increased in agricultural productivity and improvements in environmental quality. Such a large benefit-to-cost ratio suggests the feasibility and cost-effectiveness of halving Nr pollution through urbanization, and this would make significant contributions to achieving several SDG targets.
Keywords
SDG,Urbanization,Nitrogen
Speaker
邓欧平
浙江大学Submission Author
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Important Date
-
Conference Date
May 05
2023
toMay 08
2023
-
Mar 31 2023
Draft paper submission deadline
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May 25 2023
Registration deadline
Sponsored By
青年地学论坛理事会
中国科学院青年创新促进会地学分会
中国科学院青年创新促进会地学分会
Organized By
武汉大学
中国科学院精密测量科学与技术创新研究院
中国地质大学（武汉）
中国科学院精密测量科学与技术创新研究院
中国地质大学（武汉）
Contact Information
- 管小彬
- gu******@whu.edu.cn
- +86********
- 孙佳妮
- sc******@aconf.org
- +86********
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