{'fraction_non_alphanumeric': 0.013245033112582781, 'fraction_numerical': 0.0, 'mean_word_length': 5.237113402061856, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Animal studies of the effects of inhaled air toxins on nasal mucosa

Air pollution has been shown to have a deleterious effect on the nasal mucosa of animals; this effect manifests as increased mucous secretion and alterations in cilia and the underlying mucosa. These changes occur at levels of exposure higher than those documented in most urban areas. Consequently, it is difficult to extrapolate these findings to humans. These observations, however, suggest that populations living in highly polluted areas will have mucosal irritation that may predispose to chronic sinusitis and allergic rhinitis.