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:
“Freedom is a man’s natural power of doing what he pleases, so far as he is not prevented by force or law.”
—Marcus Tullius Cicero (106–43 B.C.)
“Suffering is by no means a privilege, a sign of nobility, a reminder of God. Suffering is a fierce, bestial thing, commonplace, uncalled for, natural as air. It is intangible; no one can grasp it or fight against it; it dwells in time—is the same thing as time; if it comes in fits and starts, that is only so as to leave the sufferer more defenseless during the moments that follow, those long moments when one relives the last bout of torture and waits for the next.”
—Cesare Pavese (1908–1950)