A fire can be super useful or cozy or even magical. But it can also be dangerous -- and in the case of wildfires, if they burn long and hot enough, they can destroy ecosystems and send lots of harmful smoke into the air. 
In this episode, we&#39;re going to find out why wildfires are getting bigger and why wildfire season is lasting longer now. We&#39;ll learn how the tribes who&#39;ve lived in what is now called Northern California managed the forests and kept fire in check for thousands of years, and how those practices are being used today. 
We&#39;ll hear from a friendly house about how to stay safe from smoke inside and find out how firefighters work to contain fires once they&#39;ve started. 
Plus, our Moment of Um answers the question: Is the name of a letter considered a word? This episode is sponsored by Bobby Wonder, a podcast from GoKidGo. You can support Brains On at brainson.org/fans — there you can donate, join our free fan club, check out our merch or buy our book!

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What causes wildfires?

American Public Media