Dietary Choices That Impact The Environment


Published on

Published in: Technology, Business
  • Be the first to comment

No Downloads
Total views
On SlideShare
From Embeds
Number of Embeds
Embeds 0
No embeds

No notes for slide

Dietary Choices That Impact The Environment

  1. 1. Dietary Choices that Impact the Environment ESS 2160 July 19, 2005
  2. 2. What do YOU do to protect the environment? <ul><li>Recycle </li></ul><ul><li>Fuel efficient cars </li></ul><ul><li>Water saving shower heads </li></ul><ul><li>Low flush toilets </li></ul><ul><li>Avoid lawn fertilizer </li></ul>
  3. 3. Do you… <ul><li>By organic food? </li></ul><ul><li>By food grown locally? </li></ul><ul><li>Eat meat or other animal products? </li></ul>
  4. 4. Ever wonder what it takes to get from here to… Here?
  5. 5. Natural Resources <ul><li>Water </li></ul><ul><li>Land </li></ul><ul><li>Energy </li></ul>
  6. 6. Water <ul><li>Drinking water for animals </li></ul><ul><li>Land irrigation for feed crops </li></ul><ul><ul><ul><li>Draining the western U.S. water basin by irrigating crops and using excessive amounts of water for animal production </li></ul></ul></ul><ul><li>Waste management </li></ul><ul><ul><ul><li>Cause contamination of local water supplies </li></ul></ul></ul>
  7. 7. Water <ul><li>Slaughter and packaging processes </li></ul><ul><ul><ul><li>Requires extreme amounts of water to reduce likelihood of contaminated products </li></ul></ul></ul><ul><ul><ul><li>Extensive cleaning of equipment requires millions of gallons of water per day </li></ul></ul></ul>
  8. 8. Land <ul><li>Pasture land </li></ul><ul><ul><ul><li>Western U.S.- land is trampled by hooves until it turns to dust and nothing can grown- “desertification” </li></ul></ul></ul><ul><ul><ul><li>Rainforests are cut down to raise cattle for beef in South America. </li></ul></ul></ul><ul><li>Crop land </li></ul><ul><ul><ul><li>More than 60% of U.S. crops are fed to livestock, same crops could be used directly for human consumption. </li></ul></ul></ul><ul><li>Soil errosion </li></ul>
  9. 9. Land <ul><li>Slaughter facilities </li></ul><ul><ul><ul><li>Contaminate land making it otherwise unusable </li></ul></ul></ul><ul><li>Waste facilities </li></ul><ul><ul><ul><li>Contaminate land making it otherwise unusable </li></ul></ul></ul><ul><ul><ul><li>No where else to get rid of waste (thus re-feeding of waste to animals  Mad Cow Disease- BSE) </li></ul></ul></ul>
  10. 10. Energy <ul><li>Crops for animal feed </li></ul><ul><ul><ul><li>10 grams of vegetable protein is required to create 1 gram of animal protein </li></ul></ul></ul><ul><ul><ul><li>Animals only convert about 5% of their consumed protein to edible protein, the rest of their diet is used as energy to move around, produce heat, produce waste, and perform bodily functions. </li></ul></ul></ul>
  11. 11. Energy <ul><li>Transportation of crops and animals </li></ul><ul><ul><ul><li>Crops are transported long distances to animals. </li></ul></ul></ul><ul><ul><ul><li>Animal products are transported long distances requiring refrigeration </li></ul></ul></ul><ul><li>Waste management </li></ul><ul><ul><ul><li>Transportation and processing of waste </li></ul></ul></ul>
  12. 12. Additional Problems <ul><li>Increases </li></ul><ul><li>Air pollution </li></ul><ul><li>Species extinction </li></ul><ul><li>Habitat loss </li></ul><ul><li>Pesticide use </li></ul><ul><li>Acid rain </li></ul><ul><li>Global warming </li></ul>
  13. 13. Factory Farming <ul><li>Large inputs of water, land, and fossil fuels </li></ul><ul><li>8 oz of beef requires 25,000 liters of water and 33% more fossil fuel than producing the equivalent caloric volume of potatoes. </li></ul><ul><li>21 billion livestock animals produced annually worldwide, out-number humans by 3.5 to 1 </li></ul><ul><li>“ Giving up” 1 pound of meat saves more water than using a water saving shower head all year! </li></ul>
  14. 15. Relative environmentally relevant differences between meat protein and a processed protein food based on soybeans (industrial countries) Environmentally relevant effect Effect of processed protein food based on soybeans Relative effect of meat protein production Land use 1 6–17 Water requirement 1 4.4–26 Fossil fuel requirement 1 6–20 Phosphate rock requirement 1 7 Emission of acidifying substances 1 >7 Emission of biocides 1 6 Emission of copper 1 >100 1 Effect refers to identical amounts of protein. The effect of soybean protein–based food is (arbitrarily) given the value of 1.
  15. 16. Comparison of the sustainability of meat-based diets with lactoovovegetarian diets <ul><li>Lactoovovegetarian diets include animals protein in the form of eggs and dairy products. </li></ul><ul><li>Lactovegetarian diets have a significantly smaller environmental impact on the environment in terms of the use of land, water, and energy. </li></ul><ul><li>Both diets are not sustainable over the long-term for feeding the U.S. population. </li></ul>
  16. 17. Comparison of the sustainability of meat-based diets with lactoovovegetarian diets <ul><li>Vegan diets contain no animal products at all- no meat, eggs, dairy, etc. </li></ul><ul><li>Vegan diets require even less resources than lactoovovegetarian diets and are a more likely solution for feeding the increasing population of people in the United States and across the globe. </li></ul>
  17. 18. At the current rate of growth, by 2020 meat consumption will reach 90 kg (198 lbs) per person each year. 1 side of beef 50 chickens Per Person 1 pig
  18. 19. What can YOU do? <ul><li>Eat plant based foods – Soy foods, beans, other plants and grains </li></ul><ul><li>Eat locally grown foods </li></ul><ul><li>Eat foods that are grown organically </li></ul>
  19. 20. Your healthy choices make for a healthy Earth!
  20. 21. References <ul><li>1 Heitschmidt, R.K., Short, R.E., and Grings, E.E. Ecosystems, Sustainability, and Animal Agriculture. Journal of Animal Science. 1996, Vol. 74. pp 1395-1405. </li></ul><ul><li>  2 Leitzmann, C. Nutrition Ecology: the Contribution of Vegetarian Diets. American Journal of Clinical Nutrition. September 2003, Vol 78, No. 3, pp657s-659s. </li></ul><ul><li>3 Nierenberg, D. Meat Production and Consumption Rise- Vital Signs 2005. WorldWatch Institute. pp 24-25. Accessed June 29, 2005 at </li></ul><ul><li>4 Pimental, D, and Pimental, M. Sustainability of Meat-based and Plant-based Diets and the Environmental. American Journal of Clinical Nutrition. September 2003, Vol 78, No. 3, pp660s-663s. </li></ul><ul><li>5 Reijnders, L, and Soret, S. Quantification of the Environmental Impact of Different Dietary Protein Choices. American Journal of Clinical Nutrition. September 2003, Vol 78, No. 3, pp664s-668s. </li></ul><ul><li>6 Vegan Society Website. Accessed June 22, 2005 at </li></ul>
  21. 22. Want more information.. <ul><li>The Food Revolution </li></ul><ul><ul><li> </li></ul></ul><ul><li>Vesanto Melina </li></ul><ul><ul><li> </li></ul></ul>