Is indoor air safer? 7 things to know and ways to stay protected in this prolonged haze season
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Recent tests show that indoor air quality can be worse than the air outside. Some product tests also indicate that expired masks may still filter particles. Experts explain that these individual findings do not tell the entire story of air safety during haze season.
A test reveals worse air quality indoors than outside, while product testing shows that some expired masks still filter particles effectively. Talking Point finds out from experts why neither finding tells the whole story.