https://phys.org/news/2019-01-thailand-pollution-bangkok.html

"The Department of Royal Rainmaking and Agricultural Aviation... expects the rainmaking to be done tomorrow (Tuesday) but it depends on wind and humidity levels," Pralong Dumrongthai, director-general of Thailand's Pollution Control Department, told reporters.

As Thais woke up Monday morning to another day of murky air blanketing its bustling construction-filled capital, environment group Greenpeace said Bangkok was currently the 10th most polluted in the world, rivalling some cities in China.