The discovery of fossil fuels as an energy source has greatly increased production processes. It has proven to be so effective that 85% of the energy in the U.S. is produced by burning fossil fuels. This increase in production also includes the production of food. However, the emissions given off by the combustion of fossil fuels to create this energy has also harmed the food industry, and will continue to do so unless we begin using alternative production methods. One of the effects of these emissions that is causing the most concern is global warming.
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The earth’s surface temperatures are currently expected to increase by 0.2 degrees celsius every ten years. This increase would create better growing conditions for food in northern regions, but at the same time could also make regions close to the equator too hot to grow certain types of food. The change in temperature would also provide a larger habitable area for insects that destroy crops. Another repercussion is an increased evaporation rate, thereby reducing the supply of water available for food growth. In addition, sea levels would rise as global warming is causing the ice caps to melt.
Low-altitude agricultural regions would eventually become completely submerged. This loss of growing area would cause the demand and the price of food to increase dramatically. Fossil fuel combustion is also resulting in an increase in ozone levels at the earth’s surface. Although it is a necessary component of the atmosphere, it is hazardous to both animals and vegetation at ground level. Ozone is formed when nitrogen oxides and volatile organic compounds (which are both emitted during fossil fuel combustion) react with each other. The resultant ozone is being absorbed by crops, and destroying them - in 1990, over $215 million in crops were destroyed in the U.K. In these ways, our use of fossil fuels and energy consumption is destroying the growth, production, and economy of a vital resource. For more information, check out these sources on energy consumption and how it affects the food industry: Agriculture, Food Production Daily, and Monitoring Energy Efficiency in the Food Industry.
Although greenhouse gas emissions resulting from the burning of fossil fuels is negatively affecting food production, the energy consumption of the food industry itself is also contributing to greenhouse gas emissions. The food industry uses about 10% of the the total energy consumed in the U.S., and the growth and production processes are extremely energy inefficient - it takes three calories of energy just to produce one calorie of food. Much of the energy used in food production isn’t actually put towards growing food, either - 40% is used to produce fertilizers, 23% is used to process and package the food, and another 32% comes from its refrigeration and cooking.
Diesel fuel is also consumed by farm machinery used for planting, tilling, and harvesting crops, as well as vehicles that transport food to finish being processed or to be sold. The large amount of energy being used so inefficiently is impacting the economy of the food industry. Right now, it is resulting in reduced incomes and losses of jobs as food production companies go out of business. This has a large impact on the economy, as 35% of the U.S. work force works in the food industry. Eventually, as the demand for food becomes greater, food prices will increase and agricultural exports will drop. In order to sustain the food industry and its economy, the industry must develop less expensive, more energy-efficient methods of food production. Check out these websites on energy usage in food production: Food Production Daily, and Sustainable Table.
There are many ways farmers can decrease both their energy consumption and expenses in food growth, production, and transportation, by practicing sustainable farming. One of the simplest ways to do this is to sell their products locally.
This simply means that less fuel is used to transport the food, therefore the farmer spends less money and uses less energy. Eliminating the process of tilling the soil can also save energy and money, as the farm equipment that would normally till the soil requires about 3.9 gallons of diesel fuel per acre of land. On an average farm of about 740 acres, the farmer would save 2886 galleons of fuel and almost $7 720. Refraining from tilling the soil also counteracts some of the effects of fossil fuel combustion. When plants absorb carbon, they draw it down into the soil and out of the air. By not tilling the soil, the carbon is able to stay in the ground. Farmers can also cut down on the large amount of energy used in the production of fertilizer by using manure, a natural fertilizer. If animals are allowed to graze in the fields, they feed themselves as well as spread manure. This greatly reduces the cost of fertilizer and feed for the animals, as well as the fuel needed to transport them to the farm. These simple practices allow farmers to save energy and reduce the impact of global warming on food production, as well as save money to sustain the economy of the food industry. Check out this information on sustainable farming: Sustainable Table.
- Stephanie Fleming
Works Cited
Buchdahl, Joe and Hare, Sue. "Agriculture." Encyclopedia of the Atmospheric Environment. 2000. http://www.ace.mmu.ac.uk/eae/Global_Warming/Older/Agriculture.html (accessd October 25, 2009).
Decision News Media. "Energy efficient food safety." Food Production Daily. April 27, 2004. http://www.foodproductiondaily.com/Processing/Energy-efficient-food-safety (accessd October 25, 2009).
Fletcher, Anthony. "Food production hit by increasing ozone levels." Food Production Daily. October 8, 2004. http://www.foodproductiondaily.com/Supply-Chain/Food-production-hit-by-increasing-ozone-levels (accessed October 25, 2009).
Ramirez, C. A. "Monitoring Energy Efficiency in the Food Sector." Utrect University. September 22, 2005. http://www.chem.uu.nl/nws/www/publica/Publicaties2005/E2005-66.pdf (accessed November 1, 2009).
Sanders, Rich. "Fossil fuel and energy use." Sustainable Table. 2003. http://www.sustainabletable.org/issues/energy/ (accessed October 25, 2009).
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