['"It', 'is...unfortunste', 'that', 'the', 'possibility', 'of', 'avolding', 'lung', 'cancer', 'by', 'reducing', 'or', 'sbstaining', 'from', 'cigarette', 'smoking,', 'though', 'well', 'supported', 'statisticelly,', 'has', 'been', 'so', 'poorly', 'accepted', 'by', 'the', 'public...."', '(pages', '5,', '6)', '"Air', 'Pollution', 'Frimer,"', 'published', '1969', 'by', 'Nationsl', 'Tuberculosis', 'and', 'Rezpira=', 'tory', 'Disease', 'Association,', 'New', 'York', 'City', '(0%', 'pages).', '"The', 'effect', 'on', 'the', 'lungs', 'of', 'sulfur', 'dicxide', 'carried', 'on', 'a', 'benz-', 'pyrene', 'aerosol', 'is', 'o', 'synergistic', 'one.', 'And', 'thé', 'effect', 'of', 'cigerette', 'smoking', 'and', 'air', 'pollution', 'together', 'may', 'be', 'another....The', 'health', 'of', 'an', 'individual...', 'responds', 'to', 'many', 'things.', 'Some', 'are', 'the', 'varisbles', 'of', 'the', 'environment...others', 'are', 'peculiar', 'to', 'him,', 'such', 'as', 'his...smoking', 'habits.', '(Cigarette', 'smoking', 'is', 'so', 'important', 'e', 'factor', 'in', 'chronic', 'respiratory', 'disesse', 'that', 'it', 'may', 'becloud', 'or', 'even', 'conceal', 'the', 'effects', 'of', 'polluted', 'air....(pages', '56,', '57)', '"In', 'Great', 'Britain', 'air', 'pollution--like', 'cigarette', 'smoking--is', 'considered', 'to', 'be', 'a', 'distinct', 'cause', 'of', 'chronic', 'bronchitis....In', 'this', 'country', 'information', 'on', 'chronic', 'bronchitis', 'is', 'less', 'easily', 'come', 'by....Cigarette', 'smoking', 'appeers', 'to', 'be', 'g0', 'overwhelmingly', 'significant', 'that', 'investigators', 'are', 'having', '&', 'hard', 'time', 'identifying', 'the', 'role', 'of', 'air', 'pollution....(page', '69)', '"A', 'recent', 'review', 'of', 'the', 'case', 'historles', 'of', 'more', 'than', '50,000', 'emphy-', 'sems,', 'patients', 'indicates', 'that', 'air', 'pollution', 'dould', 'have', 'been', '&', 'factor', 'in', 'their', 'illness,', 'although', 'cigarette', 'smoking', 'was', 'of', 'far', 'greater', 'importance..,..', 'Lung', 'cancer,', 'like', 'emphysema,', 'cennot', 'be', 'attributed', 'to', 'any', 'single', 'cause.', 'But', 'it', 'seems', 'very', 'likely', 'that', 'mtmospheric', 'conteminsnts,', 'together', 'with', 'other', 'Tactors--especially', 'cigarette', 'smoking--contribute', 'to', 'the', 'development', 'of', 'this', 'disease."', '(page', '72)', '"The', 'Age', 'of', 'Maturity,"', 'published', 'July', '1969', 'by', 'Office', 'of', 'Health', 'Economics,', 'London,', 'England', '(48', 'pages).', '"Factors', 'associated', 'with', 'incressed', 'risk', 'of', 'falling', 'vietim', 'to', 'coronary', 'heart', 'disease', 'include', 'hypertension,', 'cigarette', 'smoking,', 'excess', 'welght', 'and', 'inactivity,', 'stress', 'and', 'high', 'blood', 'cholesterol', 'level....(page', '15)', '"The', 'etiology', 'of', 'lung', 'cancer...is', 'not', 'yet', 'understood,', 'but', 'the', 'ceusal', 'relationship', 'with', 'smoking', 'is', 'now', 'well', 'established.', 'While', 'many', 'factors', 'may', 'have', 'had', 'a', 'bearing', 'on', 'the', 'differences.,.in', 'male', 'and', 'famale', 'mortelity', 'rates...the', 'only', 'factor', 'that', 'has', 'altered', 'radically', 'in', 'recent', 'years', 'is', 'the', 'consumption', 'of', 'tobacco....Among', 'femnles,', 'the', 'proportionate', 'inerease', 'in', 'cigarette', 'consumption', 'per', 'head', 'between', '1944', 'and', '1965', 'is', 'elmost', 'exactly', 'equel', 'to', 'the', 'propoertionate', 'increase', 'in', 'lung', 'cancer', 'mortality.', 'This', 'is', 'not', 'the', 'case', 'for', 'males,', 'but...s', 'similar', 'leveling', 'off', 'has', 'occurred', 'in', 'both', 'cigarette', 'consumption', 'and', 'lung', 'cancer', 'mortality', 'rates.”', '(pege', '20)', '-000', '=']