Вот уже восемь тысяч лет люди интенсивно разводят...

For eight thousand years, people have been intensively raising cows. Today, in terms of numbers, these mammals occupy the second (after humans) place - there are 1.3 billion of them on Earth. In Latin America, there are nine cows for every 10 people. In Australia, there are 40% more cows than people. The total weight of a live mooing population is three times the collective mass of humanity. The average human consumption of beef is 40 kg per year, and this beef, before being on our table, in turn, eats 600 million tons of grain annually (a third of the world harvest). Over the past 60 years, approximately two-thirds of all steppe regions in the world have turned into pastures. More than a quarter of all forests in South America were carved out for grazing (18 thousand m2 of tropical jungle were destroyed for each local cow). A two-year-old cow, capable of producing 300 kg of meat, requires 3.5 tons of soybeans and grain, 14,600 liters of water for fattening, and another 600,000 liters is spent on growing feed. Over two years of life, the body of a cow emits about 200 thousand liters of methane into the atmosphere - thus, the volume of this poisonous gas released by the entire world cow community is almost as good as the exhaust of the world car fleet. And then there's 20 kg of manure from one cow every single day ...