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Where does air pollution come from?

(ourworldindata.org)
233 points kamaraju | 1 comments | 02 Apr 25 04:25 UTC | HN request time: 0s | source
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Jiahang ◴[02 Apr 25 06:52 UTC] No.43554257[source]▶
After experiencing the COVID-19 pandemic, I have developed the habit of wearing a mask.
replies(1): >>43555027 #
1. rudolftheone ◴[02 Apr 25 09:39 UTC] No.43555027[source]▶
Yeah... The thing is surgical or cloth masks don’t do much against PM2.5. For actual pollution, you’d need a well-fitted N95 — anything less is mostly placebo with ear loops.