A day of lockdown would probably not have a measurable impact. The first result I got on scholar for atmospheric pollutant half-life claims 83.5 days: [1]: ht

A day of lockdown would probably not have a measurable impact. The first result I got on scholar for atmospheric pollutant half-life claims 83.5 days: [1]: https://hysz.nju.edu.cn/_upload/article/files/79/b2/159a67624f869eef629c078f8867/72917f8f-ab11-436b-b6df-366c69ba1fb3.pdf https://hysz.nju.edu.cn/_upload/article/files/79/b2/159a6762...