The air high quality in Hanoi may be very bad
At the morning of January 2, Hanoi’s air was once very polluted, the sky was once hazy, visibility was once sharply diminished, and the focus of PM2.5 (particulate topic with diameter) These days, air high quality in Hanoi remains to be forecast at an overly dangerous stage (red threshold) with an index fluctuating above 200. … Read more