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Researchers in Boulder in Colorado in the United States say mushrooms can prevent fires taking hold in forests. Bacteria from the mushrooms, known as fungi can turn piles of wood - which could help flames spread - into soil, whch can't. Zach Hedstrom is a mushroom expert in Colorado. He told Newshour's Rob Young ?why the fungi he grows should be deployed in the battle to stop wildfires. (Photo shows a forest in California. Credit: LiPo Ching/Digital First Media/The Mercury News via Getty Images)