Fix PM2.5 at the source
The year's end is also known as the season of air pollution. In Bangkok, it's the time when PM2.5 fills the air. In the northern region, open burning and forest fires spew air pollution, choking residents. In sugar cane farm areas in about 20 provinces in the central and northeastern region, villagers suffer from "black snow" PM2.5 dust resulting from sugarcane farmers conducting their pre-harvest...