Why do forest fires happen? What happens to the forest after a fire? Sometimes you send us questions about things you've heard about, and sometimes you send us questions about your experiences. We'll hear from 5-year-old Abby in Australia who wanted to know more about the bush fires near her home earlier this year. Liam and Emma tell us about their wildfire experiences in California, and we get answers to your questions from Ernesto Alvarado, professor at the University of Washington.