||It has been suggested that this article be merged into Eco-
cities. (Discuss) Proposed since January 2013.| A sustainable
city, or eco-city is a city designed with consideration of
environmental impact, inhabited by people dedicated to
minimization of required inputs of energy, water and food, and
waste output of heat, air pollution - CO2, methane, and water
pollution. Richard Register first coined the term "ecocity" in
his 1987 book, Ecocity Berkeley: Building Cities for a Healthy
Future. Other leading figures who envisioned the sustainable
city are architect Paul F Downton, who later founded the company
Ecopolis Pty Ltd, and authors Timothy Beatley and Steffen
Lehmann, who have written extensively on the subject. The field
of industrial ecology is sometimes used in planning these
cities. There remains no completely agreed upon definition for
what a sustainable city should be or completely agreed upon
paradigm for what components should be included. Generally,
developmental experts agree that a sustainable