Comment by Jiahang Comment by Jiahang 2 days ago 1 reply Copy Link View on Hacker News After experiencing the COVID-19 pandemic, I have developed the habit of wearing a mask.
Copy Link rudolftheone 2 days ago Collapse Comment - 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. Reply View | 0 replies
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.