Human beings evolved as meat-eating animals. However, when the game became scarce and the human species left nomadic life and started living in one place, they started farming and raising animals for food. Actually, the beginning of the agricultural age about 10,000 BCE (Before Common Era) was the first step towards civilization.
For thousands of years, commercial farming was unknown to human beings. Therefore, their produce (cereal, vegetables, meat, eggs etc.) were free from pesticides, insecticides, and hormones. Human beings ate everything organic and natural. However, this changed when mass production methods were invented. Factory farming invented Genetically Modified Organism (GMO). Commercial farming not only took a toll on human health (because they started eating unnatural, toxin treated foods), but also put the environment in danger.
Meat is one of the major food sources for human specials. Before the evolution of industrial farming, families raised and processed their own livestock. They fed their livestock toxins free foods. Since feed supplements (artificial substances) were not invented, chickens, hogs, cattle, sheep ate natural food and they produced natural eggs, meat, and milk. And human beings ate natural meat and milk products.
When industrial farming evolved, people not only started feeding milk and meat animals artificial substances but also invented Genetically Modified Organism (GMO). Today, chicken, eggs, milk and meat we eat is either treated with toxins or GMO. When human beings started eating chemicals and GMO used in livestock and crops, various diseases evolved. Factory farming is putting the human race in danger. Apart from health risks, factory farming is also threatening the very existence of human race because of damages caused to the environment. Factory farms leave behind an environmental toll which will have to be paid by the generations to come.
Raising animals for food uses a lot of resources. A factory farm is one of the greatest polluter of water and major cause of Carbon dioxide gas production. About 85 percent of soil erosion is caused by industrial faming. Factory farming and ranching is not only poisoning our food but also damaging our land, water and air.
In United States alone, half of the water is consumed by the animals raised for food, and one-third of all raw materials, including fossil fuels, are used by meat and milk animals. About 87 percent of agricultural land in the United States, which is 45 percent of the total land mass of the country, is used to raise animals for food. Compared to other industries, factory farms in the United States pollute more water.
Factory farming and ranching is also causing global warming. Methane is one of four greenhouse gases that contribute to global warming. It is estimated that one-fifth of all methane emission is caused by animals raised for food. According to one data, animals raised for food produce 20 times the excrement of the entire human population. It is estimated that animals raised for food produce 230,000 pounds waste every second.
Factory farming and ranching is also one of the main causes of deforestation. Rain forests are being destroyed at a rate of 125,000 square miles per year. Deforestation is damaging our soil, air and also the climate.
The costs of raising animals for food and is very high. Production and processing consume a lot of resourced. What can an average human being can do about this? The only way to correct this mistake is by eating less meat and eating more plant based food.