#1 Introduction:          

San Diego home to 1.38 million residents, is the eighth largest city in the United States. It is part of California, the largest U.S. state by population. San Diego is the second largest city in this state, it is also part of Southern California. This city is 120 miles south of Los Angeles and just twenty miles north of Mexico.  According to the textbook, Joel Garreau has San Diego falling in the MexAmerica region.      

http://solar.calfinder.com/blog/news/in-san-diego-you-can-go-solar-without-owning-a-home/