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:
““Having reached the term of his natural life”; Mwould it not be truer to say, Having reached the term of his unnatural life?”
—Henry David Thoreau (1817–1862)
“Unto a life which I call natural I would gladly follow even a will-o’-the-wisp through bogs and sloughs unimaginable, but no moon nor firefly has shown me the causeway to it.”
—Henry David Thoreau (1817–1862)