研究发现,农村地区超过5 000万美国人缺乏空气质量监测。 Over 50 million Americans in rural areas lack air-quality monitoring, study finds.

宾夕法尼亚州的一项研究表明,5 000多万美国人生活在没有空气质量监测的县,主要影响中西部和南部农村地区。 A Penn State study reveals that over 50 million Americans live in counties without air-quality monitoring, affecting mostly rural areas in the Midwest and South. 这些未受监测的县的贫困率往往较高,受教育程度较低,西班牙裔和黑人人口较多。 These unmonitored counties tend to have higher poverty rates, lower educational attainment, and larger Hispanic and Black populations. 研究人员强调必须更好地监测基础设施,以保护公众健康免受空气污染。 The researchers stress the need for better monitoring infrastructure to protect public health from air pollution.