City
This note is about the city or the "urban environment".
Definitions
On the changing definition ("continuum of urbanity").
Pickett, Steward T. A., and Weiqi Zhou. ‘Global Urbanization as a Shifting Context for Applying Ecological Science Toward the Sustainable City’. Ecosystem Health and Sustainability 1, no. 1 (2015): 1–15. https://doi.org/10/grjzt4.
Ecological Aspects
Gandy, Matthew. Natura Urbana: Ecological Constellations in Urban Space. Cambridge, MA: The MIT Press, 2022.