Compared with hot and energetic fire, wood is cold and weak. Leaping flames bring people a mixed feeling of safety and danger, but what about wood? Even towering trees may also be cut down by human beings and then made into tables, beds, soft white paper, and disposable wooden chopsticks.

Humans cannot have total control of fire, so they use it and fear it simultaneously. How about trees? They won't fight back, so people just use trees and don't hold them in ...