Stay-at-home policies invoked in response to COVID-19 have led to well-publicized drops in some air pollutants. The extent to which such reductions translate to improved air quality is dictated by not only emissions and meteorology, but also chemical transformations in the atmosphere.

中文翻译：

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COVID-19关闭对空气质量的复杂化学影响。

为响应COVID-19而采取的“留在家中”政策导致了一些空气污染物的广为人知的下降。减少量转化为改善空气质量的程度不仅取决于排放量和气象，还取决于大气中的化学转化。