An article in Scientific American states
fires are not just a result of a changing climate, they're also contributing to the overall warming trend much more than imagined, the authors report. As vegetation burns, it releases stored-up carbon into the atmosphere, speeding global warming and thereby exacerbating conditions that may generate a greater incidence of wildfires in the coming years. But across the globe, fires have been getting larger and stronger. "We are witnessing an increasing instance of these megafires," says Thomas Swetnam, director of the Laboratory of Tree-Ring Research at the University of Arizona.