California Air Resources Board 2004 Almanac (web)								
Chapter 4	San Diego Directly Emitted PM2.5  Emission Trends				Table 4-31			
"Directly Emitted PM2.5 Emission Trends (tons/day, annual average)"								
Emission Source	1975	1980	1985	1990	1995	2000	2005	2010
All Sources	34	36	35	40	39	41	43	46
Stationary Sources	11	9	3	4	6	6	6	8
Area-wide Sources	15	19	22	25	24	26	27	28
On-Road Mobile	2	2	3	4	3	3	3	3
   Gasoline Vehicles	1	1	1	1	1	2	2	2
   Diesel Vehicles	0	1	2	3	2	1	1	1
Other Mobile	6	6	7	7	6	6	6	6