BANGKOK (NNT) – The National Environmental Board has approved the Pollution Control Department’s proposal to tighten the air quality safety standard by reducing the acceptable level of PM2.5 dust in t
![pollution-nord-1.jpg](https://img.siamnews.net/2019/06/pollution-nord-1-696x418.jpg)
BANGKOK (NNT) – The National Environmental Board has approved the Pollution Control Department’s proposal to tighten the air quality safety standard by reducing the acceptable level of PM2.5 dust in t
© Siam News Network Ltd.