NASC 130 Essentials3_ch12

Resources hydroelectric power negative aspects dams

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Unformatted text preview: in Rock: Energy & Mineral Resources Wind Energy High-tech wind farms are sprouting worldwide High-tech Wind drives a large turbine to produce electricity Wind-derived electricity is renewable and carbon-free Drawbacks: Wind farms have negative aesthetic impacts Turbine blades are noisy and kill birds Essentials of Geology, 3rd edition, by Stephen Marshak Chapter 12: Riches in Rock: Energy & Mineral Resources Solar Energy By far the most abundant source of energy to the surface Solar energy dwarfs that of hydrocarbon resources But, solar energy is hard to utilize because it is… Diffuse Highly variable on a seasonal and daily basis Difficult to convert into more usable forms of energy Essentials of Geology, 3rd edition, by Stephen Marshak Chapter 12: Riches in Rock: Energy & Mineral Resources Solar Energy Solar Energy Two ways to use solar energy directly Solar collectors concentrate sunlight for heating Photovoltaic (PV) cells convert light directly into electricity Both are useful for small buildings, not large cities Both Essentials of Geology, 3rd edition, by Stephen Marshak Chapter 12: Riches in Rock: Energy & Mineral Resources Biomass Biomass – energy from plant and animal matter Early humans used biomass (wood, charcoal, dung) To be useful today, biomass must be grown quickly Ethanol – alcohol derived from corn Burned as a motor fuel Produced in large quantities Unproven as a gasoline replacement Unproven Essentials of Geology, 3rd edition, b...
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