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Section 5: Food Production, Nutrition and Environmental Effects. How much has food production increased? How serious is undernutrition and malnutrition? How serious of a problem is overnutrition? What are the environmental impacts of our food choices? Can China’s population be fed?.
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How much has food production increased?
How serious is undernutrition and malnutrition?
How serious of a problem is overnutrition?
What are the environmental impacts of our food choices?
Can China’s population be fed?
Tripled between 1950 -1985, since then it has leveled off
World produced enough food to meet basic needs, but still 1 in 6 do not get enough to meet nutritional needs
Poverty, inequality, war, famine, corruption
Large amounts of macronutrients (protein, carbs, fats)
Small amounts of micronutrients (A, C, E, iron, iodine, calcium)
Fig. 14-16 p. 287
Food intake exceeds energy use and causes body fat
See Fig. 14-18 p. 290
Need to know these page 290
What is the gene revolution?
What is genetically modified food?
Can we continue to increase food supplies? If so, how?
How are rangelands used to produce meat?
Is producing more meat the answer to the world’s food problems?
What are the effects of overgrazing?
How can meat be produced more sustainable?
Are grasslands in temperate and tropical climates that provide foraging and browsing areas for animals
Feedlots: animals are fattened for slaughter in densely populated confined areas
CAFOs = 43% world beef
See page 295 box
Occurs when too many animals graze for too long and exceed the carrying capacity of the grassland area
Kilograms of grain needed per kilogram of body weight
Fig. 14-22 p. 297
Where do we get our fish and shellfish?
What are the impacts of over fishing?
What is aquaculture?
Fisheries: concentrations of aquatic species suitable for harvesting from a body of water
Aquaculture: using feedlot management to raise marine and freshwater fish.
Efficiency of converting grain to animal protein
High Tech Global Fishing Fleets Roam World
Trawling: dragging a funnel shaped net along bottom of sea
Bycatch thrown back
Purse-Seine Fishing: Surrounding schools of fish with boats and a huge net to capture entire school
Long lining: putting out lines up to 80 miles long with thousands of hooks
Drift netting: using huge nets to trap fish
Raising fish and shellfish for food, like crops
How do governments influence agriculture?
How can the world become more sustainable with agriculture?
See Fig. 14-29 p. 302