Capital expenditures				Operating costs
			Solid				Solid		Cost
Year	Air	Water	waste	Total	Air	Water	waste	Total	offsets
	billions of constant (1992) dollars
1973	0.47	0.46	0.03	0.96	0.17	0.33	0.12	0.62	0.15
1974	0.70	0.50	0.03	1.24	0.21	0.40	0.14	0.75	0.22
1975	0.77	0.63	0.04	1.44	0.24	0.44	0.14	0.82	0.27
1976	0.41	0.63	0.06	1.09	0.28	0.54	0.15	0.97	0.31
1977	0.28	0.55	0.07	0.90	0.28	0.65	0.18	1.12	0.32
1978	0.24	0.37	0.06	0.67	0.31	0.70	0.21	1.22	0.35
1979	0.37	0.33	0.07	0.77	0.32	0.73	0.22	1.26	0.29
1980	0.33	0.18	0.05	0.56	0.33	0.72	0.21	1.26	0.41
1981	0.25	0.13	0.05	0.43	0.32	0.71	0.22	1.26	0.45
1982	0.27	0.13	0.04	0.45	0.29	0.65	0.19	1.13	0.30
1983	0.17	0.09	0.04	0.30	0.31	0.70	0.25	1.26	0.35
1984	0.20	0.09	0.06	0.35	0.37	0.75	0.28	1.40	0.16
1985	0.24	0.13	0.05	0.42	0.40	0.73	0.30	1.43	0.14
1986	0.17	0.12	0.05	0.34	0.40	0.70	0.33	1.43	0.17
1987	nd	nd	nd	nd	nd	nd	nd	nd	nd
1988	0.27	0.11	0.10	0.49	0.43	0.73	0.40	1.56	0.29
1989	0.44	0.29	0.17	0.90	0.43	0.77	0.42	1.62	0.30
1990	0.44	0.54	0.16	1.15	0.42	0.84	0.45	1.72	0.28
1991	0.49	0.57	0.20	1.27	0.41	0.81	0.46	1.68	0.18
1992	0.40	0.37	0.23	1.00	0.54	0.82	0.50	1.86	0.25
1993	0.30	0.28	0.12	0.70	0.50	0.83	0.52	1.85	0.23
1994	0.23	0.19	0.19	0.61	0.51	0.79	0.49	1.79	0.27

Source: U.S. Department of Commerce, Bureau of the Census, Pollution Abatement Costs and Expenditures, Current Industrial Reports (GPO, Washington, DC, annual).

Notes: nd = no data. Data for 1987 were not collected. This series was discontinued after 1994.

Last Updated on 7/27/99
By Carroll Curtis