名词
中文翻译：污染指数
同义词：
['pollutant index', 'pollution level', "pollution score例句：1. The city's air quality has significantly improved since theimplementation of stricter emission standards.（自从实施了更严格的排放标准以来，该城市的空气质量已经显著改善。）2. The pollutionindex in this area isvery high", 'which posesa serious threat to the local ecosystem.（该地区的污染指数非常高，这对当地生态系统构成了严重威胁。）']
例句：
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1. The city's air quality has significantly improved since theimplementation of stricter emission standards.
自从实施了更严格的排放标准以来，该城市的空气质量已经显著改善。
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2. The pollutionindex in this area isvery high, which posesa serious threat to the local ecosystem.
该地区的污染指数非常高，这对当地生态系统构成了严重威胁。
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3.To reduce pollution, many citieshave implemented policies that encourage the useof public transportation and promote green energy.
为了减少污染，许多城市实施了鼓励使用公共交通和推广绿色能源的政策。