said nearly 500 students have abnormal blood readings a health problems and some we diagnosed with leukea or lympho and had skin conditions. >> translator: the skin of my hands is peeling off. >> cctv said a previous survey found the levels of pollutants in ground water and soil were far above safety standards. the broadcaster called it a typical case of build first and assess later. local government officials said environmental assessments conducted in march found no problem. >>> workers with the tokyo metropolitan government are fanning out across parks in search of an unwelcome guest. they're looking for mosquitos that might be carrying zika or the dengue virus, the same type is capable of transmitting both. >>> tokyo officials say they'll conduct checks twice a month at nine parks. they'll publish the results online. workers are using nets to catch the insects. they're also pouring pesticide into ditches to prevent breeding. so far this year four people returning from trips to latin america were found to be carrying the zika virus. health experts believe zika is connected to birth def