Document 85aO2vZnk4Y5pKdm99qkNgny5

Table II. Estimated annual emissions, tops (particulate emissions refer to material emitted as particulates, and not particulates formed photo- chemically, etc.) Global particulates from natural sources 2,U00 X 106 Global particulateB from pollution 100 X 106 Total U. S. air pollution (1968) 21U X 106 Total U. S. particulates from air pollu tion (1968) 28 X 10 Total U. S. gaseous emissions from gasoline-driven vehicles Total U. S. gaseous emissions from dle6el 81 X 10s vehicles 1.5 X 10 Total U. 5. particulate emissions from gasoline-driven vehicles 0.5 X 10 Total U. S. particulate emissions from diesel vehicles 0.5 X 10 (The last figure does not include railroads and other non-highway diesel fuel consumption, which i6 about equal to the consumption by road diesels.) Particulates formed in the atmosphere from gaseous pollutants (that is, sul fates from 80s, nitrates from NO and HO2, particulates formed by atmospheric photochemical reactions of hydrocarbons, etc.) amount to eome 200 X 106 tons worldwide annually, or twice as much as the emissions of particulates qua particulates - so-called "primary" particulates - given in Table II. -J+- 6000 0618 PRODUCED BY FORD