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15-1 Feeding the World

15-1 Feeding the World. Page 379. A. Humans and Nutrition. 1. Famine is widespread starvation which occurs as a result of a shortage of food. A. Humans and Nutrition. 2. The human body needs food as a source of energy AND a source of building materials for tissues. A. Humans and Nutrition.

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15-1 Feeding the World

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  1. 15-1 Feeding the World Page 379

  2. A. Humans and Nutrition • 1. Famine is widespread starvation which occurs as a result of a shortage of food.

  3. A. Humans and Nutrition • 2. The human body needs food as a source of energy AND a source of building materials for tissues.

  4. A. Humans and Nutrition • 3. Malnutrition occurs when people do not consume enough calories or eat a variety of foods to fulfill the body's needs.

  5. A. Humans and Nutrition • 4. Malnutrition may affect the physical and mental development of children.

  6. A. Humans and Nutrition • 5. A persons diet is the type or amount of food that he or she eats.

  7. A. Humans and Nutrition • 6. Diets vary around the world; for example in the U.S. most calories come from meat, fish, and oil.

  8. B. The Ecology of Food • 1. As the human population grows, farmlands and cities are replacing forests and grasslands.

  9. B. The Ecology of Food • 2. Plants generally have more energy because they are at the base of a food chain.

  10. B. The Ecology of Food • 3. Meat, however, provides more nutrients per gram than most plants.

  11. B. The Ecology of Food • 4. With limited area to grow food, researchers are trying to increase the efficiency of food production.

  12. B. The Ecology of Food • 5. The answer may be in plants or other organisms with a high yield (amount of food produced in a given area).

  13. C. World Food Problems • 1. Malnutrition today occurs as a result of poverty and violence.

  14. C. World Food Problems • 2. The United Nations Food and Agriculture Organization (UNFAO) estimates that 925 million people around the world are malnourished.

  15. C. World Food Problems • 3. The population is growing far more rapidly than grain production (minimal needed for adequate vegetarian diet).

  16. D. The Green Revolution • 1. 1950-1970: Mexico increased wheat production and India increased rice production without increasing farmland used.

  17. D. The Green Revolution • 2. Limitations included high amounts of water and chemicals for new type of crop.

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