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When the flame is beating in hands, the dividing line of civilization and barbarity comes into being. Combustion is the most elemental and common form in chemistry, through which we begin to know chemistry. We improve our ability to reform the world through chemistry. Thus human beings become the lord of creation.
However, more and more people start having the fear of this subject which changes the human being. The artificial and chemical are antipathetic to them. Some people try to get rid of chemistry in daily life and advocate a return to the embrace of pure nature to feel the primary breath and pulse. What led us to be distinguished, now comes to its extinguish.
Nevertheless, could man really go back to nature? If we keep away from chemistry, we could hardly meet demands of the basic subsistence, not to mention to sustain the society. Besides, the first metabolism started with some chemical elements in the warm water since the flood. Therefore we could not get ride of chemistry. To be accurate, we are witnessing chemical changes.
Since chemistry is a part of human being, which has to be faced since it could not be cast off. The ancestors of evolutionists found out that it would not solve the problem of facing the darkness by hiding in a warm cave illuminated by bonfires. They understood later, that the courage of face up the fear is the only light source to disperse darkness.