Ever since the beginning of life, the primary challenge has been how to obtain energy. Today, about four billion years later, humanity still faces that same problem, perhaps on a larger scale than ever before. Today, we have about 7.2 billion people on earth with about 800 million hungry people. The world population continues to grow at a rapid rate; it has tripled over the last 60 years and is projected to increase to 9.2 billion people by 2050 and the food demand is projected to increase by 70%. We are therefore, facing three major food challenges. Eliminate world hunger, increase food production by seventy percent, and finally, sustain the planet against agricultural damage. If we collectively do nothing, this will shortly turn into a major …show more content…
About 750 million tons of crops or thirty-six percent of total grains produced goes into feeding livestock animals that eventually produce food for human beings. A central issue that the global food system is facing is that animal products require far more calories to produce than they end up contributing to the food system. If we consume plants directly, as primary consumers, as opposed to indirectly eating as secondary consumers, we will save a lot of grain and many natural resources like land and water. Each animal product we eat requires the input of a considerably greater amount of plant material. In fact, less than 10% of energy passes to each successive trophic level from the level below it. This suggests using human-edible crops to feed animals is an inefficient way to provide calories to humans. It takes twenty-nine calories of grain to produce just a single calorie of beef. In addition to the extra grain required, the livestock industry also requires extra land, extra water, and more energy to harvest crops, transport animals, and to run slaughterhouses. For example, in the United States, for the 20 million tons of humanly edible and nutritious protein that is fed to livestock yearly (apart from the waste products and drugs), only about 2 million tons of meat protein is obtained; and out of that amount, less than 27 percent can be utilized by the human body. There may …show more content…
Given the current trend, by 2050, the increases in meat production will reach to a point where we could feed 4 billion extra people with the plant food that is used to raise cattle. In a time when hundreds of millions of people are starving every day, we are snatching food from the mouths of starving babies and feeding it to plump beasts just to satisfy our taste buds. Every time we take a bite of meat, we are consuming the total grain and water that the animal has consumed to live and grow and thereby, we are unknowingly contributing to the process of global starvation. In fact, if the current annual worldwide production of corn, wheat, soy, and rice, if instead of being fed to livestock animals, were fed to humans, there would be no such thing as global