Natural Causes
An erupting volcano can also emit high levels of sulphur dioxide along with a large quantity of particulate matter; two key components to the creation of smog. However, the smog created as a result of a volcanic eruption is often known as "vog" to distinguish it as a natural occurrence.
The radiocarbon content of some plant life has been linked to the distribution of smog in some areas. For example; presence of Creosote bush in the Los Angeles area has been shown to have an effect on smog distribution that is more than fossil fuel combustion alone.
Read more about this topic: Smog
Famous quotes containing the word natural:
“Compassion has no place in the natural order of the world which operates on the basis of necessity. Compassion opposes this order and is therefore best thought of as being in some way supernatural.”
—John Berger (b. 1926)
“They can play a bugle call like you never heard before,
So natural that you want to go to war.”
—Irving Berlin (1888–1989)