这些地区的环境质量有什么变化？
晋陕蒙宁黑三角、湘黔渝锰三角等地的环境质量得到改善。[{'character': '晋', 'pinyin': 'jin4', 'highest pitch': 10.83, 'lowest pitch': 9.7, 'duration': 0.27, 'prosody hierarchy': 'null'}, {'character': '陕', 'pinyin': 'shan2', 'highest pitch': 10.0, 'lowest pitch': 8.07, 'duration': 0.24, 'prosody hierarchy': '#1'}, {'character': '蒙', 'pinyin': 'meng3', 'highest pitch': 10.0, 'lowest pitch': 5.83, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '宁', 'pinyin': 'ning2', 'highest pitch': 8.74, 'lowest pitch': 5.76, 'duration': 0.26, 'prosody hierarchy': '#2'}, {'character': '黑', 'pinyin': 'hei1', 'highest pitch': 10.6, 'lowest pitch': 8.74, 'duration': 0.24, 'prosody hierarchy': 'null'}, {'character': '三', 'pinyin': 'san1', 'highest pitch': 10.72, 'lowest pitch': 8.89, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '角', 'pinyin': 'jiao3', 'highest pitch': 8.94, 'lowest pitch': 3.63, 'duration': 0.31, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.21}, {'character': '湘', 'pinyin': 'xiang1', 'highest pitch': 11.38, 'lowest pitch': 10.78, 'duration': 0.28, 'prosody hierarchy': 'null'}, {'character': '黔', 'pinyin': 'qian2', 'highest pitch': 11.05, 'lowest pitch': 8.23, 'duration': 0.24, 'prosody hierarchy': 'null'}, {'character': '渝', 'pinyin': 'v2', 'highest pitch': 8.98, 'lowest pitch': 6.91, 'duration': 0.2, 'prosody hierarchy': '#2'}, {'character': '锰', 'pinyin': 'meng3', 'highest pitch': 10.0, 'lowest pitch': 5.0, 'duration': 0.28, 'prosody hierarchy': 'null'}, {'character': '三', 'pinyin': 'san1', 'highest pitch': 10.72, 'lowest pitch': 9.78, 'duration': 0.21, 'prosody hierarchy': 'null'}, {'character': '角', 'pinyin': 'jiao2', 'highest pitch': 10.37, 'lowest pitch': 6.74, 'duration': 0.21, 'prosody hierarchy': '#1'}, {'character': '等', 'pinyin': 'deng3', 'highest pitch': 6.59, 'lowest pitch': 5.3, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '地', 'pinyin': 'di4', 'highest pitch': 7.94, 'lowest pitch': 5.71, 'duration': 0.15, 'prosody hierarchy': 'null'}, {'character': '的', 'pinyin': 'de5', 'highest pitch': 6.49, 'lowest pitch': 6.13, 'duration': 0.09, 'prosody hierarchy': '#1'}, {'character': '环', 'pinyin': 'huan2', 'highest pitch': 7.26, 'lowest pitch': 6.13, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '境', 'pinyin': 'jing4', 'highest pitch': 9.0, 'lowest pitch': 7.26, 'duration': 0.18, 'prosody hierarchy': '#1'}, {'character': '质', 'pinyin': 'zhiii4', 'highest pitch': 9.42, 'lowest pitch': 7.67, 'duration': 0.16, 'prosody hierarchy': 'null'}, {'character': '量', 'pinyin': 'liang4', 'highest pitch': 7.96, 'lowest pitch': 5.41, 'duration': 0.24, 'prosody hierarchy': '#2'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.06}, {'character': '得', 'pinyin': 'de2', 'highest pitch': 7.83, 'lowest pitch': 7.06, 'duration': 0.16, 'prosody hierarchy': 'null'}, {'character': '到', 'pinyin': 'dao4', 'highest pitch': 10.01, 'lowest pitch': 7.83, 'duration': 0.17, 'prosody hierarchy': '#1'}, {'character': '改', 'pinyin': 'gai3', 'highest pitch': 4.08, 'lowest pitch': 3.81, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '善', 'pinyin': 'shan4', 'highest pitch': 9.67, 'lowest pitch': 6.63, 'duration': 0.29, 'prosody hierarchy': '#4'}]