The achievement of global sustainable development goals subject to planetary boundaries will mostly be determined by cities as they drive cultures, economies, material use, and waste generation. Locally relevant, applied and quantitative methodologies are critical to capture the complexity of urban infrastructure systems, global inter-connections, and to monitor local and global progress toward sustainability. An urban monitoring (and communications) tool is presented here illustrating that a city-based approach to sustainable development is possible. Following efforts to define and quantify safe planetary boundaries in areas such as climate change, biosphere integrity, and freshwater use, this paper modifies the methodology to propose boundaries from a city's perspective. Socio-economic boundaries, or targets, largely derived from the Sustainable Development Goals are added to bio-physical boundaries. Issues such as data availability, city priorities, and ease of implementation are considered. The framework is trialed for Toronto, Shanghai, Sao Paulo, Mumbai, and Dakar, as well as aggregated for the world's larger cities. The methodology provides an important tool for cities to play a more fulsome and active role in global sustainable development.

Daniel Hoornweg

Mehdi Hosseini

Christopher Kennedy

Azin Behdadi

Ambio

AMBIO 探索人为活动与环境之间的联系，鼓励多学科或跨学科的提交，并提供明确的管理或政策建议。 AMBIO 解决了影响人类环境状况的科学、社会、经济和文化因素。 AMBIO 特别鼓励具有明确管理或政策建议的多学科或跨学科提交。 45 多年来，AMBIO 为专家、通才、学生、决策者和感兴趣的外行的国际读者群体带来了环境研究、政策和相关活动的重要发展的国际视野。

The journal AMBIO explores the connections between human activities and the environment, encouraging multidisciplinary or interdisciplinary submissions while providing clear management or policy recommendations. It addresses the scientific, social, economic, and cultural factors that affect the state of the human environment. AMBIO particularly encourages multidisciplinary or interdisciplinary submissions that include explicit management or policy suggestions. For over 45 years, AMBIO has offered an international perspective on significant developments in environmental research, policy, and related activities for experts, generalists, students, decision-makers, and interested laypersons.

AMBIO 期刊探索人为活动与环境之间的联系，鼓励多学科或跨学科的研究提交，并提供明确的管理或政策建议。该期刊关注影响人类环境状况的科学、社会、经济和文化因素。AMBIO 特别鼓励具有明确管理或政策建议的多学科或跨学科研究。45 多年来，AMBIO 为专家、通才、学生、决策者和感兴趣的外行提供了环境研究、政策和相关活动的重要发展的国际视野。

An urban approach to planetary boundaries.

An urban monitoring (and communications) tool is presented here illustrating that a city-based approach to sustainable development is possible and provides an important tool for cities to play a more fulsome and active role in global sustainable development.

Category	Quartile
环境科学与生态学	2
环境科学与生态学, 工程环境	2
环境科学与生态学, 环境科学	2

An urban approach to planetary boundaries.

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Journal Info

Category	Quartile
ENVIRONMENTAL SCIENCES	1