Causes of Forest Fires
Wildfires can be ignited by a variety of occurrences. In addition to lightning, human-related activities start a large number of fires every year. Unattended or out-of-control campfires, a discarded burning cigarette, arson, or even equipment use can set off a blaze.
Once a forest fire has started, many factors contribute to its spread and intensity.
More than 83% of forest fires in 2006 were started by human activities, accounting for the burning of nearly 4.4 million acres. However, lightning-caused fires burned more total area – nearly 5.5 million acres. *
* Source: National Interagency Fire Center
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