What is the term for the self-sustaining cities proposed by Paolo Soleri?

The term that accurately describes the self-sustaining cities proposed by Paolo Soleri is "Arcology Alternative." This concept combines architecture and ecology to create urban environments that are integrative and sustainable. Soleri envisioned arcologies as densely populated structures that minimize land use while maximizing the efficiency of energy and resources. By focusing on self-sufficiency and ecological harmony, Soleri's arcologies aim to reduce the environmental impact of traditional urban development.

While the other terms relate to different urban concepts or designs, they do not specifically encapsulate Soleri's vision of self-sustaining cities. For instance, Marine City and Motopia refer to unique urban models but lack the ecological focus that defines arcology. Metabolism, on the other hand, is a movement rooted in Japan that explores urban development connected to biological growth but does not specifically address Soleri's work with arcologies. In summary, "Arcology Alternative" is the appropriate term that reflects the essence of Paolo Soleri's innovative urban philosophy.