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  1. <text id=93AC0146>
  2. <title>
  3. National Air Pollutant Emissions:1970-91
  4. </title>
  5. <history>
  6. Compact ALMANAC--United States Statistics         
  7. Environment & Weather                                
  8. </history>
  9. <article>
  10. <source>Time Almanac</source>
  11. <hdr>
  12. National Air Pollutant Emissions: 1970 - 1991
  13. </hdr>
  14. <body>
  15. <p>[In millions of metric tons; except lead (in thousands of metric tons). Metric ton=1.1023 short tons. PM:Particulate matter; SOx: Sulfur oxides; NOx:Nitrogen oxide; VOC:Volatile organic compound; CO:Carbon monoxide; Pb:Lead.]
  16. </p>
  17. <table>
  18. <tblhdr><cell>Year<cell>PM<cell>SOx<cell>NOx<cell>VOC<cell>CO<cell>Pb
  19. <row><cell type=a>EMISSIONS<cell type=n><cell type=n><cell type=n><cell type=n><cell type=n><cell type=n>
  20. <row><cell>1970<cell>18.5<cell>28.3<cell>18.3<cell>26.2<cell>100.2<cell>203.8
  21. <row><cell>1975<cell>10.6<cell>25.8<cell>19.2<cell>22.1<cell>82.2<cell>147.0
  22. <row><cell>1980<cell>8.5<cell>23.4<cell>20.4<cell>22.3<cell>77.0<cell>70.6
  23. <row><cell>1981<cell>8.0<cell>22.6<cell>20.4<cell>21.0<cell>74.4<cell>55.9
  24. <row><cell>1982<cell>7.1<cell>21.4<cell>19.6<cell>19.7<cell>69.4<cell>54.4
  25. <row><cell>1983<cell>7.1<cell>20.7<cell>19.0<cell>20.4<cell>71.3<cell>46.3
  26. <row><cell>1984<cell>7.4<cell>21.5<cell>19.7<cell>21.5<cell>68.7<cell>40.1
  27. <row><cell>1985<cell>7.0<cell>21.1<cell>19.8<cell>20.1<cell>64.6<cell>21.1
  28. <row><cell>1986<cell>6.8<cell>20.7<cell>19.3<cell>19.3<cell>61.1<cell>8.6
  29. <row><cell>1987<cell>7.0<cell>20.4<cell>19.5<cell>19.6<cell>61.4<cell>8.1
  30. <row><cell>1988<cell>6.9<cell>20.7<cell>19.8<cell>18.6<cell>61.2<cell>7.6
  31. <row><cell>1989<cell>7.6<cell>21.5<cell>19.3<cell>17.4<cell>68.3<cell>5.5
  32. <row><cell>1990<cell>7.4<cell>21.1<cell>19.4<cell>17.6<cell>67.7<cell>5.1
  33. <row><cell>1991<cell>7.4<cell>20.7<cell>18.8<cell>16.9<cell>62.1<cell>5.0
  34. <row><cell>PERCENT CHANGE(1)<cell><cell><cell><cell><cell><cell>
  35. <row><cell>1970<cell>-14.4<cell>43.7<cell>43.0<cell>15.9<cell>13.7<cell>(NA)
  36. <row><cell>1975<cell>-42.7<cell>-8.8<cell>4.9<cell>-15.6<cell>-18.0<cell>-27.9
  37. <row><cell>1980<cell>-19.8<cell>-9.3<cell>6.3<cell>.9<cell>-6.3<cell>-52.0
  38. <row><cell>1981<cell>-5.9<cell>-3.4<cell>(NC)<cell>-5.8<cell>-3.4<cell>-20.8
  39. <row><cell>1982<cell>-11.2<cell>-5.3<cell>-3.9<cell>-6.2<cell>-6.7<cell>-2.7
  40. <row><cell>1983<cell>(NC)<cell>-3.3<cell>-3.1<cell>3.6<cell>2.7<cell>-14.9
  41. <row><cell>1984<cell>4.2<cell>3.9<cell>3.7<cell>5.4<cell>-3.6<cell>-13.4
  42. <row><cell>1985<cell>-5.4<cell>-1.9<cell>.5<cell>-6.5<cell>-6.0<cell>-47.4
  43. <row><cell>1986<cell>-2.9<cell>-1.9<cell>-2.5<cell>-4.0<cell>-5.4<cell>-59.2
  44. <row><cell>1987<cell>2.9<cell>-1.4<cell>1.0<cell>1.6<cell>.5<cell>-5.8
  45. <row><cell>1988<cell>-1.4<cell>.5<cell>2.6<cell>(NC)<cell>-4.5<cell>-5.0
  46. <row><cell>1989<cell>-3.8<cell>.9<cell>-2.0<cell>-6.5<cell>-9.5<cell>-6.8
  47. <row><cell>1990<cell>-2.6<cell>-1.9<cell>.5<cell>1.1<cell>-.9<cell>-7.3
  48. <row><cell>1991<cell>(NC)<cell>-1.9<cell>-3.1<cell>-4.0<cell>-8.3<cell>-2.0
  49. </table>
  50. <list>
  51. <item>NC=No change from previous year.
  52. <item>NA=Not available.
  53. <item>1. Percent change from prior year shown (1960 figures used for prior year 1970 change).
  54. </list>
  55. <p>Source: U.S. Environmental Protection Agency.
  56. </p>
  57. </body>
  58. </article>
  59. </text>
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