[' ', 'Appellee', 'claims', '(Jt.', 'App.', '227)', 'that', 'the', 'medical', 'data', 'submitted', 'by', 'appellants', 'is', 'not', 'adequate', 'because', 'tests', 'were', 'not', 'conducted', 'in', 'sur-', 'voundings', 'as', 'well', 'ventilated', 'as', 'an', 'airplane.', 'As', 'previously', 'indicated', 'the', 'evidence', 'in', 'the', 'docket', 'establishes', 'that', 'airplanes', 'are', 'frequently', 'filled', 'with', 'smoke', 'concentrations.', '(Jt.', 'App.', '232-247).', 'The', 'concentration', 'of', 'people', 'on', 'a', 'fully', 'occupied', 'airplane', 'is', 'considerably', 'higher', 'than', 'in', 'a', 'house,', 'office', 'or', 'restaurant.', 'wv', 'Furthermore', 'airplane', 'ceilings', 'are', 'lower', 'and', 'there', 'is', 'more', 'space', 'occupied', 'in', 'an', 'airplane', 'by', 'baggage', 'racks', 'and', 'chairs', 'than', 'in', 'an', 'average', 'room.', 'Thus', 'the', 'airplane', 'environment', 'is', 'considerably', 'more', 'cramped', 'and', 'more', 'susceptible', 'to', 'smoke', 'concentration', 'than', 'the', 'environments', 'in', 'which', 'the', 'tests', 'were', 'made.', 'The', 'most', 'persuasive', 'evidence', 'of', 'the', "Administrator's", 'arbitrariness', 'is', 'his', 'frank', 'admission', 'that', 'the', 'problem', 'of', 'adverse', 'health', 'consequences', 'is', 'sufficiently', 'serious', 'to', 'warrant', 'an', 'in-depth', 'exploration', '(Jt.', 'App.', '227).', 'Appellants', 'argue', 'that', 'the', 'present', 'data', 'on', 'adverse', 'health', 'consequences', 'is', 'not', 'conclusive', 'but', 'surely,', 'as', 'the', 'Administrator', 'concedes,', 'it', 'is', 'pro-', 'bative.,', 'If', 'there', 'were', 'even', 'one', 'articulated', 'rational', 'reason', 'for', 'continuing', 'to', 'allow', 'smoking', 'on', 'airplanes,', 'perhaps', 'the', "Administrator's", 'inaction', 'would', 'not', 'appear', 'to', 'be', 'nearly', 'so', 'arbitrary.', 'But', 'no', 'such', 'rational', 'reason', 'has', 'been', 'presented.', 'Surely', 'the', 'health', 'of', 'the', 'more', 'than', '2,000', 'passengers', 'who', 'wrote', 'to', 'the', 'FAA', 'asking', 'for', 'immediate', 'relief', 'not', 'to', 'mention', 'millions', 'of', 'atria', 'is', 'justification', 'enough', 'to', 'give', 'them', 'the', 'benefit', 'of', 'every', 'doubt', 'and', 'to', 'free', 'them', 'from', 'the', 'smoke-filled', 'airplane', 'cabin', 'at', 'least', 'until', 'studies', 'are', 'completed', 'which', 'conclusively', 'prove', 'the', 'case', 'one', 'way', 'or', 'the', 'other.', ' ', 'af', 'According', 'to', 'a', 'letter', 'from', 'Boeing', 'Aircraft', 'Corporation', 'contained', 'in', 'the', 'FAA', 'Docket,', 'there', 'is', '8835', 'cubic', 'feet', 'of', 'space', 'in', 'a', 'fully', 'furnished', 'Boeing', '707.', 'With', '165', 'passengers', 'on', 'board', '(Jt.', 'App.', '226)', 'there', 'is', '54', 'cubic', 'feet', 'for', 'each', 'passenger', 'or', 'a', 'space', '6', 'feet', 'x', '3', 'feet', 'x', '3', 'feet.', 'Even', 'the', 'notorious', 'Washington', 'cocktail', 'party', 'or', 'smoke', 'filled', 'room', 'gives', 'cach', 'person', 'more', 'space.', 'The', '54', 'cubic', 'feet', 'is', 'about', 'the', 'size', 'of', 'a', 'coffin.', '“31+']