In the early and middle stages of urbanization, the United States pursued a free economic theory, and the market mechanism played a major role. The federal government's weak regulatory measures led to excessive suburbanization, resulting in structural imbalances in urban development planning, the sprawl of urban sprawl, serious waste of land resources, ecological A series of issues such as environmental damage. In response to this, in the later stages of urbanization, the U. S. government gradually increased its control, strengthened urban planning and industrial planning through legislation and administrative intervention, and gradually paid attention to environmental protection, especially in the 1990s. The "smart growth" movement proposed by the U. S. government has had a profound impact on urbanization. What does this text tell us? ['The government must attach importance to promoting balanced development between urban and rural areas.', 'Ecological environment is the first consideration in the process of urbanization.', 'Urbanization and coordinated economic development can achieve results.', 'The government should plan and intervene in the development of urbanization.']