What are Mexico City's natural resources?

Answer:
Mexico City is an urban area of over 21 million inhabitants with little to non-existing natural resources. Most of these were depleted since the time of the Aztecs, and modern Mexico City has only a couple of sand and stone quarries to the west of the city.
First answer by Everac99. Last edit by Everac99. Contributor trust: 261 [recommend contributor recommended]. Question popularity: 2 [recommend question].