Air pollution in the Thai capital forced more than 350 schools to close on Friday, city authorities said, the highest number in five years. The reading makes the Thai capital currently the world's ...

Primary and secondary wastewater treatment processes are essential for removing pollutants, ensuring environmental stability ...

10 facts about air pollution The gas is the cause of ... said: “As ozone is a secondary pollutant, it would require efforts to lower the emissions of NOx and VOCs in order to control the ...

Air pollution forced nearly 200 schools in Bangkok ... The facilities range from kindergartens to secondary schools and the closures last from a day to a week. Dozens of other schools in the ...