Residents of Metro Manila and Calabarzon (Cavite, Laguna, Batangas, Rizal, Quezon) woke up to a hazy morning on Friday, Sept. 22, 2023. The blur was believed to have been caused by smog or vog from sulfur dioxide emitted by Taal Volcano, forcing local governments to suspend work and classes because of the health risk posed by such emissions. The Philippine Institute of Volcanology and Seismology clarified later in the day that the haze was caused by thermal inversion and air pollutants. PHOTO BY J. GERARD SEGUIAResidents of Metro Manila and Calabarzon (Cavite, Laguna, Batangas, Rizal, Quezon) woke up to a hazy morning on Friday, Sept. 22, 2023. The blur was believed to have been caused by smog or vog from sulfur dioxide emitted by Taal Volcano, forcing local governments to suspend work and classes because of the health risk posed by such emissions. The Philippine Institute of Volcanology and Seismology clarified later in the day that the haze was caused by thermal inversion and air pollutants. PHOTO BY JOHN ORVEN VERDOTEResidents of Metro Manila and Calabarzon (Cavite, Laguna, Batangas, Rizal, Quezon) woke up to a hazy morning on Friday, Sept. 22, 2023. The blur was believed to have been caused by smog or vog from sulfur dioxide emitted by Taal Volcano, forcing local governments to suspend work and classes because of the health risk posed by such emissions. The Philippine Institute of Volcanology and Seismology clarified later in the day that the haze was caused by thermal inversion and air pollutants. PHOTO BY RENE H. DILANResidents of Metro Manila and Calabarzon (Cavite, Laguna, Batangas, Rizal, Quezon) woke up to a hazy morning on Friday, Sept. 22, 2023. The blur was believed to have been caused by smog or vog from sulfur dioxide emitted by Taal Volcano, forcing local governments to suspend work and classes because of the health risk posed by such emissions. The Philippine Institute of Volcanology and Seismology clarified later in the day that the haze was caused by thermal inversion and air pollutants. PHOTO BY J. GERARD SEGUIAResidents of Metro Manila and Calabarzon (Cavite, Laguna, Batangas, Rizal, Quezon) woke up to a hazy morning on Friday, Sept. 22, 2023. The blur was believed to have been caused by smog or vog from sulfur dioxide emitted by Taal Volcano, forcing local governments to suspend work and classes because of the health risk posed by such emissions. The Philippine Institute of Volcanology and Seismology clarified later in the day that the haze was caused by thermal inversion and air pollutants. PHOTO BY RIO DELUVIOResidents of Metro Manila and Calabarzon (Cavite, Laguna, Batangas, Rizal, Quezon) woke up to a hazy morning on Friday, Sept. 22, 2023. The blur was believed to have been caused by smog or vog from sulfur dioxide emitted by Taal Volcano, forcing local governments to suspend work and classes because of the health risk posed by such emissions. The Philippine Institute of Volcanology and Seismology clarified later in the day that the haze was caused by thermal inversion and air pollutants. PHOTO BY RIO DELUVIOResidents of Metro Manila and Calabarzon (Cavite, Laguna, Batangas, Rizal, Quezon) woke up to a hazy morning on Friday, Sept. 22, 2023. The blur was believed to have been caused by smog or vog from sulfur dioxide emitted by Taal Volcano, forcing local governments to suspend work and classes because of the health risk posed by such emissions. The Philippine Institute of Volcanology and Seismology clarified later in the day that the haze was caused by thermal inversion and air pollutants. PHOTO BY JOHN ORVEN VERDOTEResidents of Metro Manila and Calabarzon (Cavite, Laguna, Batangas, Rizal, Quezon) woke up to a hazy morning on Friday, Sept. 22, 2023. The blur was believed to have been caused by smog or vog from sulfur dioxide emitted by Taal Volcano, forcing local governments to suspend work and classes because of the health risk posed by such emissions. The Philippine Institute of Volcanology and Seismology clarified later in the day that the haze was caused by thermal inversion and air pollutants. PHOTO BY J. GERARD SEGUIAResidents of Metro Manila and Calabarzon (Cavite, Laguna, Batangas, Rizal, Quezon) woke up to a hazy morning on Friday, Sept. 22, 2023. The blur was believed to have been caused by smog or vog from sulfur dioxide emitted by Taal Volcano, forcing local governments to suspend work and classes because of the health risk posed by such emissions. The Philippine Institute of Volcanology and Seismology clarified later in the day that the haze was caused by thermal inversion and air pollutants. PHOTO BY RENE H. DILANResidents of Metro Manila and Calabarzon (Cavite, Laguna, Batangas, Rizal, Quezon) woke up to a hazy morning on Friday, Sept. 22, 2023. The blur was believed to have been caused by smog or vog from sulfur dioxide emitted by Taal Volcano, forcing local governments to suspend work and classes because of the health risk posed by such emissions. The Philippine Institute of Volcanology and Seismology clarified later in the day that the haze was caused by thermal inversion and air pollutants. PHOTO BY J. GERARD SEGUIA