Air quality data (data stream G) — achievement of environmental objectives 2021 (dataset)

Data stream G represents the formal area-based assessment of air quality with respect to limit and target values, taking into account, where appropriate, the extension of the deadline granted and adjusted for contributions from natural sources and the application of stray sand and salt in winter service.数据流G代表针对限值与目标值开展的正式区域空气质量评估，该评估将酌情考量已获批的期限延期，并针对自然源排放贡献以及冬季养护作业中抛洒的砂石与融雪盐的影响进行修正。