Prayoon Chuenjet, Technocrat, Senior Professional level, Provincial Public Health, explains how to test the chemical substance residue in food which Sodium hydrosulfide, Borax and Formaldehyde are tested in this time.

Thai Education Foundation and Greenpeace Southeast Asia jointly organized a teacher training on the impact of chemical substances on health which is part of "We Grow - Sustainable School Lunch" at Wat Khum Kaew School, Thanyaburi, Pathum Thani. There are teachers from 12 schools in Pathum Thani attending the training.