How does the children react to the fire in glass
castle

I think that it is mostly Jeannette that has a strong reaction to fire. After returning from the hospital, Jeannette becomes enthralled by fire. Her parents support this, insistent that she not be defeated or afraid of that which led to her injury. Not only does Jeannette resume cooking hot dogs on the stove (to the delight of her mother) but she also starts to steal her father’s matches. 

Maybe littering, cutting down trees and pollution