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Air pollution is one of the most significant environmental risks to health, causing around four million premature deaths yearly, according to the World Health Organization (WHO). In rural areas, crop residue burning is a common source of air pollution, despite imposed restrictions.

Taal Volcano in Batangas is still emitting high levels of sulfur dioxide (SO2) causing hazardous volcanic smog or “vog” in the vicinity, the Philippine Institute of Volcanology and Seismology (Phivolcs) said on Tuesday, Aug. 24.

Taal Volcano has emitted an average of 15,416 tons of sulfur dioxide (SO2) per day on Sunday, Aug. 22, the Philippine Institute of Volcanology and Seismology (Phivolcs) said on Monday, Aug. 23.

The Taal Volcano has continued to emit high levels of volcanic sulfur dioxide which caused a volcanic smog or “vog” over its vicinity, said the Philippine Institute of Volcanology and Seismology (Phivolcs).

Science and Technology Undersecretary and Philippine Institute of Volcanology and Seismology (Phivolcs) OIC Renato Solidum Jr. said the smog observed in Metro Manila was not due to the Taal Volcano’s steady emission of sulfur dioxide that caused volcanic smog or “vog” over the volcano island on Monday, June 28.

Volcanic smog or “vog” has been observed over Taal Volcano’s caldera brought about by the high levels of sulfur dioxide gas emissions from the restive volcano in Batangas, the Philippine Institute of Volcanology and Seismology (Phivolcs) said on Monday, June 28.