I don’t know exactly how big an arc is needed to start a fire Not very big, sparks coming off a tow chain dragging behind a vehicle can start a fire. http://w

I don’t know exactly how big an arc is needed to start a fire Not very big, sparks coming off a tow chain dragging behind a vehicle can start a fire. http://www.fox13news.com/news/local-news/officer-shows-how-small-spark-can-become-wildfire http://www.fox13news.com/news/local-news/officer-shows-how-s...