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:
“As writers become more numerous, it is natural for readers to become more indolent; whence must necessarily arise a desire of attaining knowledge with the greatest possible ease.”
—Oliver Goldsmith (1728–1774)
“The Royal Navy of England hath ever been its greatest defence and ornament; it is its ancient and natural strength; the floating bulwark of the island.”
—William Blackstone (1723–1780)