AIR POLLUTION WOE Taal Volcano, shown in this photo taken from Tagaytay City in May, remains under alert level 1 or low level of unrest. Volcanic smog or vog from Taal has worried residents of towns and cities surrounding the volcano in Batangas due to its impact on their health. Photo by Rem Zamora MANILA, Philippines — Classes in several areas of Batangas, Cavite, and Laguna were suspended on Monday, September 25, due to volcanic smog or vog from Taal Volcano. The Philippine Institute of Volcanology and Seismology said vog can cause irritation of the eyes, throat, and respiratory tract.

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