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== What is a sustainable city == | == What is a sustainable city == | ||
A sustainable city can feed and power itself with little reliance on the surrounding countryside, and creates the smallest possible [[ecological footprint]] for its residents. This is friendly to the surrounding environment, with negligible [[pollution]], low-impact land use, and alleviation of [[climate change | A sustainable city can feed and power itself with little reliance on the surrounding countryside, and creates the smallest possible [[ecological footprint]] for its residents. This is friendly to the surrounding environment, with negligible [[pollution]], low-impact land use, and alleviation of [[climate change]]. | ||
The first thing to consider in how sustainable a city can be is its physical layout. Sprawling means more transport cost, more cost and energy used for [[infrastructure]], and more difficulty in ecological processing of water and [[wastewater]]. | The first thing to consider in how sustainable a city can be is its physical layout. Sprawling means more transport cost, more cost and energy used for [[infrastructure]], and more difficulty in ecological processing of water and [[wastewater]]. |