Votes and proceedings of the General Assembly of the state of New-Jersey . to the atmosphere in industrializedareas cause measurable changes in the weather and climatein the immediate vicinity and for considerable distancesdownwind, but up until now it has not been possible toseparate weather and climatic trends on a global scale fromchanges which are occurring naturally. However, one of thepollutants, carbon dioxide (CO2), added as a result of thecombustion of fossil fuels, has increased steadily in thepast 15-20 years, and mean temperatures in the areas ofits concentration have increased by
Votes and proceedings of the General Assembly of the state of New-Jersey . to the atmosphere in industrializedareas cause measurable changes in the weather and climatein the immediate vicinity and for considerable distancesdownwind, but up until now it has not been possible toseparate weather and climatic trends on a global scale fromchanges which are occurring naturally. However, one of thepollutants, carbon dioxide (CO2), added as a result of thecombustion of fossil fuels, has increased steadily in thepast 15-20 years, and mean temperatures in the areas ofits concentration have increased by several degrees models show that if the present rate of increasein the atmospheres C02 load continues, global climaticchanges will become detectable in about a century. Thefigure illustrates the trends in increased atmospheric CO2content measured at four widely separated locations forthe period 1958-69- Although differing slightly in absolutevalues, the trends are highly similar for all sets. Meanvalues are in ppm (parts per million). •17- CRS-353. CO CO CO _ (ludd) ^001° senjBA uee^ CRS-354 Caption for figure 2 Growing industrialization adds to the air ever-increasingamounts of pollutants, including carbon dioxide, moisture,aerosols, heat, and particulate matter. Some of these pollu*-tants may cause measurable change in weather and climate bothwhere they originate and in areas downwind. Yet evidence thatthey have caused global climatic changes is submerged in thenoise of natural climatic fluctuations. However, increasesin the amount of carbon dioxide in the air by fossil fuelburning if continued at the present rate may cause surfacetemperatures to rise and cause significant global climaticchanges. The figure shows annual mean temperature changesin degrees celsius for three latitude belts for the period1870-1967. The horizontal bar gives the mean of tempera-ture changes in the latitude belt 0°-80°N for the climato-logical epoch 1931-60. -19- CRS-355
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