The Evolution of Human Civilization and Four Toilet Revolutions

From a great historical perspective, human civilization has experienced three stages, primitive civilization, agricultural civilization, industrial civilization, and it is exploring and advancing toward ecological civilization. Correspondingly, the toilet revolution has also undergone through three stages. The first toilet revolution is from open defecation to simple aqua privies, and the second toilet revolution is reprocessing of manure and urine, agricultural recycling. The third toilet revolution is using flush toilets and the popularity...Scan the QR code below for more sharing from Clear.

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