Chapter 5: The North American Manufacturing Core

Los Angeles city does not export any noticeable natural resources. However, there are 3 petroleum fields in southern california. Also, Los Angeles is the largest manufacturing center in western United States.

"Los Angeles is the largest major manufacturing center in the United States, with 500,000 workers in manufacturing activities in 2003. The largest components are apparel, computer and electronic products, transportation products, fabricated metal products, food products and furniture"

With proximity to pacific manufacturing stations, like Japan and Korea, easy truck, railroad and airplane shipping makes the city a major city for international trade, such that almost fifty headquarters of foreign companies are located in the area.

http://www.city-data.com/us-cities/The-West/Los-Angeles-Economy.html