CAGAYAN DE ORO CITY — Transboundary smoke drifting from raging forest and land fires in Kalimantan, Indonesia, has triggered deteriorating air quality across Northern Mindanao, sending pollution gauges in neighboring Iligan City to “acutely unhealthy” levels. Air monitoring data released by the Department of Environment and Natural Resources-Environmental Management Bureau-10 (DENR-EMB-10) revealed a steady spike