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Installing air filters in classrooms has surprisingly large educational benefits (2020)

(www.vox.com)
308 points tangjurine | 1 comments | 31 Mar 25 00:22 UTC | HN request time: 0.206s | source
1. Animats ◴[31 Mar 25 07:47 UTC] No.43532289[source]▶
What are they "filtering"? You can filter particulates, but methane removal is more complicated.