air pollution emission factor

例句：

1. 1.The city's air pollution emission factor is a major concern for its residents.
   该市的空气污染排放因子是居民们最关心的问题。
2. 2.The government has set strict regulations to reduce the air pollution emission factor.
   政府已制定严格的规定以降低空气污染排放因子。
3. 3.The study found that the air pollution emission factor in this area is significantly higher than the national average.
   研究发现，该地区的空气污染排放因子明显高于全国平均水平。