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Today there are 16, 8 billion farm animals, that is more two times than people. At the same time, the animals are eating much more. It is estimated that all animals that are grown for the production of meat products, consume more protein than they produce. Regarding the pigs, it is the ratio of 1/9, and for the chickens it is 1/5. 10 kilograms of grain, that are fed to animal gives only a kilo of meat. All the rest is processed into manure.
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