they work k for germans development agency, giz, and are advising the vietnamese governrnment.atrick: what's speciaial abot this measuringng device is tht it's cheap, it's been tested, and it's easy to move from place to place. that means the authorities can measure the air quality in various parts of the city at moderate cost. reporter: the numbers so far have been truly awful. last year, air pollution was, on average, four times the maximum considered acceptable by the world health organization. and the air was considered clean on only 38 days last year. the countltless building s sis also generate a loof d dust. high-rise apartment blocks are going up all over the city. the authorities ignored the problem of air pollution for a long time. now, it's a priority issue. a workshop abobout air quality s recently held for students at this school for the first time. it was organized by the german air pollution consultants and a vietnamese ngo, green i.d. the school uniform includes the red scarf of the communist young pioneersrs movement. vietnam is, after all,l, a one-party social