percent of the valley's population of over 1,350,000 lives in the Toluca metropolitan area. The rest live in the over 400 other communities of the valley. Due to the political shift, the Nevado de Toluca volcano which towers over the valley has become the cultural symbol for the State of Mexico.

Economy and environmental degradation

Until the mid 20th century, the main economic activities were agriculture and forestry, due to large expanses of forest, the valley floors' fertile soils and the Lerma River. Industrialization of

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