Sulfur dioxide from Taal spread to NCR and other provinces, Phivolcs clarifies with new data enablePagination: false endIndex: Metro Manila (CNN Philippines, June 30) — Citing new data, state volcanologists on Wednesday said there is evidence that the volcanic sulfur dioxide from Taal Volcano spread to Metro Manila and nearby provinces, causing hazy skies this week. The clarification came a day after the Philippine Institute of Volcanology and Seismology said human-made pollution was the source of the haze despite recording the highest sulfur dioxide (S02) emission from the restive volcano. "Our Institute had initially negated these observations due to the lack of substantiating evidence," it said in a statement.