
Residents have, however, been asked to limit outdoor activities in areas with high volcanic smog levels. Commonly known as vog, it is a form of air pollution created when sulfur dioxide and other pollutants emitted from volcanic activity interact chemically with atmospheric moisture, oxygen, dust, and sunlight. While not deadly, it can irritate skin and the tissues and mucous membranes of the eyes, nose, and throat, and it can be particularly harmful to individuals with preexisting respiratory conditions.