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Resources, Food, and Population. Dr. Charles Ophardt EDU 370. Minerals. A mineral deposit is a volume of rock enriched in one or more materials Minerals that do not require further processing - For example - gemstones, sand, gravel, and salt (halite). Origin of Mineral Deposits.

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resources food and population

Resources, Food, and Population

Dr. Charles Ophardt

EDU 370

minerals
Minerals
  • A mineral deposit is a volume of rock enriched in one or more materials
  • Minerals that do not require further processing - For example - gemstones, sand, gravel, and salt (halite).
origin of mineral deposits
Origin of Mineral Deposits
  • Hydrothermal Mineral Deposits
  • Magmatic Mineral DepositsPegmatites
  • Sedimentary Mineral DepositsEvaporites
  • Placer Mineral Deposits - water - gold
  • Residual Mineral Deposits - erosion - Bauxite
processed minerals
Processed Minerals
  • Ironat one time 40% hemitite ores used
  • AluminumAluminum is the third most abundant mineral in the Earth's crust - (NaAlSi3O8, KalSi3O8), but mined as bauxite
  • Copper3% to less than 1%
science technology
Science & Technology
  • Case StudyExample of how to bring science and technology into a series of lessons.Should more public lands be opened for mining?
  • Make a project for groups
  • Assign roles
  • Give or help find background materials
energy resources
Energy Resources
  • Fossil FuelsOilNatural gasCoalOil Shale and Tar Sands
  • Combustion reactionFuel(CxHy) + O2 --> CO2 + H2O + Energy
  • Earth at Night
slide7
Land
  • The availability of arable land at world level is less than 0.27 ha per capita,
  • Deforestation
  • Biodiversity. The replacement of natural ecosystems, especially tropical forests, for agricultural purposes results in a loss of biodiversity.
land ii
Land (II)
  • The food supply worldwide is increasingly dependent on stocks of fossil energy, in the form of fertilizers, pesticides, irrigation and machinery. I.e. technology
water
Water
  • Water supply.
  • Irrigation
  • Worldwide about 69% of the fresh water withdrawn is for the agricultural sector
  • Desertification - caused by over grazing, loss of cover vegetation
food and energy
Food and Energy
  • Energy - Food Chain Pyramid
  • Food Supply - Eat grain rather than Meat
  • Feeding the World
food and energy11
Food and Energy
  • TABLE 7 Equivalent feeding values of corn per kg animal product in the United States (USDA, 1990).
  • Animal product (1 kg) Corn feeding value (kg)
  • Milk 0.86
  • Egg 3.2
  • Broiler 2.4
  • Pig 5.7
  • Beef 12.6
references
References
  • Prof. Stephen A. Nelson Tulane Universityhttp://www.tulane.edu/~sanelson/geol111/matenergy.htm
  • FOOD, LAND, POPULATION and the U.S. ECONOMY by David Pimentel Cornell University and Mario Giampietro Isiituto Nazionale dell; Nutrizione, Rome http://dieoff.org/page55.htm