那铝厂的环境污染情况如何？
周边居民时常会看到有烟气从铝厂林立的大烟囱中排出。[{'character': '周', 'pinyin': 'zhou1', 'highest pitch': 9.7, 'lowest pitch': 8.02, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '边', 'pinyin': 'bian1', 'highest pitch': 9.8, 'lowest pitch': 8.02, 'duration': 0.19, 'prosody hierarchy': '#1'}, {'character': '居', 'pinyin': 'jv1', 'highest pitch': 9.53, 'lowest pitch': 9.35, 'duration': 0.16, 'prosody hierarchy': 'null'}, {'character': '民', 'pinyin': 'min2', 'highest pitch': 9.36, 'lowest pitch': 7.27, 'duration': 0.27, 'prosody hierarchy': '#1'}, {'character': '时', 'pinyin': 'shiii2', 'highest pitch': 9.82, 'lowest pitch': 8.37, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '常', 'pinyin': 'chang2', 'highest pitch': 9.86, 'lowest pitch': 7.66, 'duration': 0.21, 'prosody hierarchy': '#1'}, {'character': '会', 'pinyin': 'huei4', 'highest pitch': 9.41, 'lowest pitch': 7.32, 'duration': 0.14, 'prosody hierarchy': 'null'}, {'character': '看', 'pinyin': 'kan4', 'highest pitch': 9.37, 'lowest pitch': 7.11, 'duration': 0.26, 'prosody hierarchy': 'null'}, {'character': '到', 'pinyin': 'dao4', 'highest pitch': 7.23, 'lowest pitch': 5.69, 'duration': 0.26, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.21}, {'character': '有', 'pinyin': 'iou3', 'highest pitch': 8.58, 'lowest pitch': 6.2, 'duration': 0.14, 'prosody hierarchy': 'null'}, {'character': '烟', 'pinyin': 'ian1', 'highest pitch': 10.64, 'lowest pitch': 6.76, 'duration': 0.25, 'prosody hierarchy': 'null'}, {'character': '气', 'pinyin': 'qi4', 'highest pitch': 11.94, 'lowest pitch': 8.68, 'duration': 0.29, 'prosody hierarchy': '#1'}, {'character': '从', 'pinyin': 'cong2', 'highest pitch': 8.58, 'lowest pitch': 7.44, 'duration': 0.27, 'prosody hierarchy': '#1'}, {'character': '铝', 'pinyin': 'lv2', 'highest pitch': 9.32, 'lowest pitch': 7.59, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '厂', 'pinyin': 'chang3', 'highest pitch': 9.44, 'lowest pitch': 6.07, 'duration': 0.23, 'prosody hierarchy': '#1'}, {'character': '林', 'pinyin': 'lin2', 'highest pitch': 7.41, 'lowest pitch': 5.78, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '立', 'pinyin': 'li4', 'highest pitch': 8.93, 'lowest pitch': 6.38, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '的', 'pinyin': 'de5', 'highest pitch': 6.6, 'lowest pitch': 5.09, 'duration': 0.21, 'prosody hierarchy': '#1'}, {'character': '大', 'pinyin': 'da4', 'highest pitch': 10.7, 'lowest pitch': 9.75, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '烟', 'pinyin': 'ian1', 'highest pitch': 10.64, 'lowest pitch': 9.49, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '囱', 'pinyin': 'cong1', 'highest pitch': 10.36, 'lowest pitch': 8.12, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '中', 'pinyin': 'zhong1', 'highest pitch': 9.06, 'lowest pitch': 8.12, 'duration': 0.17, 'prosody hierarchy': '#1'}, {'character': '排', 'pinyin': 'pai2', 'highest pitch': 8.63, 'lowest pitch': 5.84, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '出', 'pinyin': 'chu1', 'highest pitch': 8.35, 'lowest pitch': 6.44, 'duration': 0.29, 'prosody hierarchy': '#4'}]