看数据五分之一的人类引发野火, 是故意纵火. 相信, 实际纵火比例只会更高.

Rice reports that debris burning starts the most human-caused fires, at 29 percent, with arson the cause of 21 percent of fires. Equipment use causes 11 percent of fires, while campfires and children playing with fireworks or matches each cause 5 percent of fires. The Fourth of July, predictably, is the biggest day for wildfires, with 7,762 fires ignited on that date over the 21-year study period.

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