THE chief of the Philippine Institute of Volcanology and Seismology (Phivolcs) said on Friday that the smog or vog caused by gas emissions from Taal Volcano in Batangas since early September is no cause for alarm.

Phivolcs Director Teresito "Toto" Bacolcol told The Manila Times that the vog was due to the "persistent sulphur dioxide (SO2) emission," which could be traced to the possibility that "the volcano did not emit gas when it erupted in 2020."

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