自2016年以来,由于更清洁的车辆和能源,美国主要城市的空气污染下降了22%,环保局计划到2028年强化规则。 U.S. air pollution dropped 22% in major cities since 2016 due to cleaner vehicles and energy, with EPA planning stronger rules by 2028.

2026年1月18日发表的一份新的联邦研究报告发现,美国主要城市的空气污染水平在过去十年中大幅下降,颗粒物质浓度平均下降22%。 A new federal study released on January 18, 2026, finds that air pollution levels in major U.S. cities have dropped significantly over the past decade, with particulate matter concentrations falling by 22% on average. 报告将改进归功于更严格的排放条例、更多地使用电动车辆和扩大可再生能源的采用。 The report attributes the improvement to stricter emissions regulations, increased use of electric vehicles, and expanded renewable energy adoption. 专家们说,尽管低收入和农村社区仍存在差距,但每年取得的进展可以防止成千上万的过早死亡。 Experts say the progress could prevent thousands of premature deaths annually, though disparities remain in low-income and rural communities. 环境保护局宣布了到2028年加强现有标准的计划。 The Environmental Protection Agency announced plans to strengthen current standards by 2028.