Nearly five weeks ago , Beijing experienced its worst day of air quality on record : Levels of PM2.5 — small particulates that can cause lung , cardiovascular and respiratory disease — soared to more than 30 times the level considered safe by the World Health Organization .
Niya phisqha siman jalkiptatarxaruxa , Beijing-ax kuntaminasyun uñjäna : jisk ’ a partikulanakax pulmun usunakas kartyuwaskular usunakas ukat samsuñ usunakas ukjam apanispa , ukat “ Organización Mundial de la Salud-an ” sataparjamax jan walinakax 30 kutimpiw yapxattawayi .