human health and pesticides.docx

human health and pesticides.docx - Human Diet 1...

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Human Diet: 1. Overnutrition – developed nations with abundant resources; diet high in saturated fat; “wealth diseases” = obesity, atherosclerosis, type 2 diabetes 2. Malnourished – enough calories but lack of nutrients; marasmus (all), kwashiorkor (protein), anemia (iron), goiter (iodine) 3. Undernourished – consume below daily calories requirements Agriculture: 1. Traditional Subsistence Agriculture: -grow what is needed -nomadic herding -polyculture -intercropping -human and animal labor -agroforestry -slash and burn -shifting cultivation 2. Traditional Intensive Agriculture: -polyculture -increased human/animal labor -grow to eat and sell -fertilizer use -increased water use 3. Industrialized Agriculture (high input): -monoculture -use large amounts of water/fertilizer/pesticide/fossil fuels Effects: chemical use, soil degradation, waste, pesticide resistance 4. Green Revolutions (High Yielding Varieties): i. First (1950-1970) – developed countries; selective breeding; hybridization monocultures; genetically engineered high-yield key crops ii. Second (1967 on) – developing countries; fast-growing dwarf varieties of rice/wheat; densely planted corn ***can protect biodiversity by using less land ***use large amounts of water/fertilizer/pesticides/fossil fuels
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