If a city can't grow outward, - it must instead grow vertically, upward and downward, motor vehicles have many harmful effects - on people and the environment., Motor vehicles are the world’s largest source of - outdoor air pollution., we can reduce the harmful effects of automobile use by - making drivers pay directly for most of the environmental and health costs caused by their automobile use—a user-pays approach., Smart growth is a set of policies and tools - that allow and encourage more environmentally sustainable urban development with less dependence on cars., An eco-city is one that - prioritizes people over cars., In an eco-city, abandoned lots and industrial sites are - cleaned up and used., In an eco-city much of the food that people eat comes from - nearby organic farms, solar greenhouses, community gardens, and small gardens on rooftops, in yards, and in window boxes.,

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