By Watsamon Tri-Yasakda and Rose Troup Buchanan BANGKOK, March 13, 2024 (AFP) – Hundreds of Thai children strain to sing the national anthem, reedy voices and fragile lungs competing against eight lanes of belching traffic next to their school’s open atrium in central Bangkok. Pupils at Suan Lumphini School assemble each morning under a coloured flag indicating the day’s air quality — red for worst, yellow for second worst, blue for best. Thailand registers dire […]