A day of lockdown would probably not have a measurable impact. The first result ...

		lrem on Aug 8, 2020 \| parent \| context \| favorite \| on: Drivers who keep their windows down are exposed to... 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/b2/159a6762...