The artist found randomly an ordinary Chinese farmer household with a sheep, two geese, ten rats, and two dogs, which led the same life every day by eating the same food. Give the food consumed and the calorie it contains, one may calculate the amount of excrement to be produced on daily basis. By extension the number of the animals which eat food of 1000 calorie everyday becomes also countable. It presents an outline of study into micro-data of household ecology.
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