Southern Mexico is the poorest, least developed region in Mexico. Some problems include a bad distribution of income, low wages and general social discontent.
The state of Sonora is the Mexican breadbasket, where modern irrigation techniques have allowed an otherwise arid climate to become the most productive in terms of agriculture and livestock rising....
As the third most populous city in the world (20 million as of 2009), Mexico City has the same problems most Megalopolis face: Higher crime rate. Higher pollution and environment degradation....