Chiang Mai’s Green Giant proves it can suck up fine dust particles
A Giant air purifier, called the Green Giant, was installed at Chiang Mai’s Tha Pae Gate yesterday and appeared to be efficient in reducing the amount of fine dust particles in the air in a 3-kilometre radius.
When this locally manufactured device was turned on at noon, the PM2.5 – particulate matters of no more than 2.5 micrometre – hovered at around 59 micrograms per cubic metre of air, and when it was turned off a little while later, the PM2.5 level had dropped to 36mcg.
Kriangkrai Rattana
