11.12

Our ancient ancestors were hunter gatherers, spending most of each decision for their next meal. About 10,000 using, humans learn to grow crops and domesticated animals, thus launching the agricultural revolution. Over the next 8000 years, the global population grew 270 million people or about half the size of the current US population. Today, the world population is over 7 billion within the next 40 years it will likely raise to 9 billion. Clearly, we have many mouths to feed. During the next hundred years, population exploded within additional 4.4 billion people. The food and agricultural organization of the United States estimated that we have managed to increase the world food supply to meet our needs over 80% of people. Given that the population continues to grow, so must food production. Two methods largely have been responsible for food increases of the past: planning crops on moral and an increasing crop yields. the 1940s saw the beginning of the green revolution. In the decades that followed, agricultural productivity per acre of corn, rice, and we more than doubled. Many factors responsible, including the use of fertilizer pesticides, Irrigation, double cropping, and most importantly, the advent of high yielding crop for IDs. In spite of its success, the green revolution also resulted in economic, environmental, and societal costs. For example, producing crops her Requires water and energy. Certainly fertilizers enhance the you have the crops, especially when used on nutrient poor or depleted soils. However, from figure 11.26 you can see that soil bacteria convert nitrogen compounds into reactive nitrogen species that move through there, water, and soil. Since compound containing the nitrate ion or the ammonium ion are very water-soluble, and access of these ions end up in waterways and promotes unwanted plant growth. Please of synthetic pesticides, though integral in raising crop yields, results And another environmental costs of the green revolution. Like nitrogen fertilizers, pesticides and tactile health and the health of the planet. Use of it insecticides saves millions of pounds of crops from being devoured by pass in the field, but at the same time these chemicals can kill beneficial insects along with the intended target. Methyl bromide is an extremely effective pesticide using the sterilizing soils and as a fumigant. It kills a wider variety of insects and is we end this section by returning to the question raised earlier of whether eating less meat translates to more food. Eating the saturated fats of beef in moderation also is part of the recommended diet. But does he study the issues of are skeptical. Where do we go from here?

Leave a Reply

Your email address will not be published. Required fields are marked *