Fire, Fire, Oh My!

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Across
  1. 4. How often a fire occurs over a period or an area
  2. 5. What the fire works alongside
  3. 7. Seasons impact fires
Down
  1. 1. Burning caused by lightning
  2. 2. Burning caused by humans
  3. 3. Measure of the change in the dominant vegetation
  4. 6. How large, how many acres, or how profound the fire is