Air Quality
Volcanic and geothermal gases, effects and how to protect yourself
SO₂
Volcanic eruptions
Breathing difficulty, asthma
Aska
Volcanic ash
Breathing, eyes, car damage
CO₂
Geothermal, volcanoes
Poisoning at high levels
H₂S
Geothermal areas
Toxic, seizures at high levels
When to worry
Iceland generally has good air quality. Risk is during eruptions (SO₂, ash) and at geothermal areas (H₂S). Monitor the Met Office.
Protection
During eruptions: close windows, use N95 mask if outside, stay uphill. Cars: don't drive in ash.