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:
“Children are incurable romantics. Brimful of romance and tragedy, we whirl through childhood hopelessly in love with our parents. In our epic imagination, we love and are loved with a passion so natural and innocent we may never know its like as adults.”
—Roger Gould (20th century)
“The dead being the majority it is a natural thing that we should have more friends among these than among the living.”
—Samuel Butler (1835–1902)