september 28

september 28 - 09/28/06 HUMAN GEOGRAPHY What plants and...

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09/28/06 HUMAN GEOGRAPHY What plants and animals feed the world? Wheat, rice, corn, and potatoes 2 out of 3 people survive on grains As income rises, so does grain consumption (indirectly) Animals? How has the green revolutions increased food production? First green revolution (1950-1970) Monocultures and high-yield varieties Fertilizers, pesticides, water Increased intensity and frequency Second green revolution (1970-present) Fast-growing dwarf varieties (rice, wheat, corn) How much has good production increased? Since 1950 global grain production has been rising, but rate of growth has slowed. Since 1978 grain production has lagged behind population growth. How serious are undernutrition, malnutrition, and overnutrition? Undernutrition/malnutrition Marasmus Kwashiorkor Overnutrition Obesity Do we produce enough food to feed the world’s people? Good news: we produce more than enough food
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september 28 - 09/28/06 HUMAN GEOGRAPHY What plants and...

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