California Air Resources Board 2009 Almanac (web)											
Chapter 4							Table 4-40				
"San Diego Air Basin  Emissions (tons/day, annual average)"											
Pollutant	1975	1980	1985	1990	1995	2000	2005	2010	2015	2020	
NOX	277	261	261	297	261	226	186	153	120	97	
ROG	445	434	399	332	259	212	172	149	139	137	
PM10	67	75	83	101	96	104	113	116	122	127	
PM25	26	27	24	29	28	30	30	31	32	33	
SOX	45	47	20	24	8	3	3	2	2	2	
CO	3388	3065	2895	2515	1785	1331	953	747	624	558