Laserfiche WebLink
<br />Or"< ~., <br />U L 1. t,.,.' <br /> <br />individual judgment and .knowledge will come into play in evaluating <br /> <br />specific environmental hazards based on the available data as presented <br /> <br />in this statement. <br /> <br />Human Health <br />"The First Annual Report of the Council on Environmental Quality, ,.g/ <br /> <br />in discussing air pollution effects, states that: <br /> <br />"Knowledge of the health effects of specific contaminants pres- <br /> <br />ent in the air is far from complete. However, the more overt <br /> <br />health effects of several major classes of pollutants are be- <br /> <br />ginning to be defined. <br /> <br />Those pollutants are found almost every- <br /> <br />where in the United States." <br /> <br />In considering effects on human health of some of these pollutants, this <br /> <br />report has this to say: <br /> <br />"Sulfur oxides.--Health may be imperiled when the annual mean <br /> <br />concentration of sulfur dioxide in the air rises above 0.04 <br /> <br />parts per million. Deaths from bronchitis and from lung cancer <br /> <br />may increace when this level of sulfur dioxide is accompanied <br /> <br />by smoke concentrations of about 0.06 parts per million. Ameri- <br /> <br />can cities often exceed this annual mean substantially. The <br /> <br />annual mean concentration of S02 in the air was 0.12 parts per <br /> <br />million in Chicago in 1968; in Philadelphia it was 0.08. When <br /> <br />sax exceed 0.11 parts per million for 3 to 4 days, adverse <br /> <br />health effects have been observed, and this level is reached in <br /> <br />many large cities during inversions. <br /> <br />30 <br />