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42 Cards in this Set
- Front
- Back
Example of an energy efficient house design
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Rocky Mountain Institute in Colorado
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Prolongs fossil fuels, creates local jobs, reduces pollution and environmental degradation, and raises the net energy yield |
Effects of reducing energy waste
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The country that is mass producing the Build Your Dreams plug-in hybrid automobile
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China
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The weakness of electric cars
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Battery longevity
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Regulates fuel efficiency in a fleet of cars
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CAFE
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Absorbs and stores heat from the sun directly within a well-insulated structure.
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Passive solar energy
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Captures energy from the sun by pumping heat-absorbing fluid through special collectors.
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Active solar energy
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Using combined heat and power; When two useful forms of energy are produced from the same source.
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Cogeneration
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The main ingredient in most solar cells
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Silicon
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Moderate environmental impact, No direct emissions of air pollutants, and lower costs w/ a natural gas back-up
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Advantages of solar energy- for high heat and electricity
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Low net energy and high costs, high water use for cooling, and needs a back-up system for cloudy days
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Disadvantages of solar energy- for high heat and electricity
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The world's fastest growing way to produce electricity
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Solar cells
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The world's leading renewable energy source used to produce electricity
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Hydropower
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The country with the greatest amount of hydroelectric plants
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Norway
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The country in which most of their energy comes from geothermal power plants
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Iceland
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Moderate to high net energy, low cost, low emissions of air pollutants, large untapped potential
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Advantages of large-scale hydropower
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Large land disturbance and displacement of people, high methane emissions from rapid biomass decay, disrupts downstream ecosystems
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Disadvantages of large-scale hydropower
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An example of small-scale hydropower
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Tidal and Wave energy
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Moderate net energy yield, little or no direct emissions of air pollutants, easy to install & move, and prices are coming down due to competition
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Advantages of solar cells
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Needs electricity storage system or backup, needs access to sun, solar-cell power plants could disrupt desert ecosystems.
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Disadvantages of solar cells
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The most energy efficient country
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Denmark
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Moderate to high net energy, widely available, low cost, little or no direct emissions of air pollution, easy to build and expand.
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Advantages of wind power
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Needs a backup storage system, visual and noise pollution, can kill birds and bats if not properly designed or located.
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Disadvantages of wind power
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Animal manure, wood, charcoal, crop residues
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Examples of biomass
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Widely available in some areas, moderate costs, no net carbon dioxide increase if burning & replanting are sustainable
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Advantages of using solid biomass
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Moderate to high environmental impact, increased carbon dioxide if burning & replanting are unsustainable, can cause solid erosion, water pollution & loss of wildlife habitat.
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Disadvantages of using solid biomass
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Reduced CO and CO2 emissions, high net energy yield for oil palm, reduced hydrocarbon emissions, and better mileage |
Advantages of biodiesel fuel
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Increased nitrous oxide emissions and smog, low net energy yields for soybean, competes with food for cropland, and clearing ares for plantations reduces biodiversity and increases CO2
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Disadvantages of biodiesel fuel
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Some reduction of CO2 emissions & high net energy yield (sugarcane, switchgrass and bagasse), & potentially renewable
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Advantages of ethanol fuel
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Low net energy yield, higher CO2 emissions, and competes with food crops (corn)
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Disadvantages of ethanol fuel
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Moderate net energy & efficiency and low cost at accessible sites, and Lower CO2 emissions than fossil fuels
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Advantages of geothermal energy
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Scarcity of suitable sites, noise and some carbon dioxide emissions
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Disadvantages of geothermal energy
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Can be produced from plentiful water at some sites, no direct CO2 emissions if produced from water, good substitute for oil, and high efficiency in fuel cells.
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Advantages of Hydrogen fuel
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Negative net energy yield, CO2 emissions if produced from carbon-containing compounds, high costs require subsidies, and needs a storage and distribution system
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Disadvantages of hydrogen fuel
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Passing electricity through water, stripping it from methane, and a chemical reaction involving coal, oxygen, and steam
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Methods of producing hydrogen gas
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Most storage options in most forms is highly flammable
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Hydrogen gas as a fuel
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Experts suggest in the next few decades we will probably shift from our current model of producing electricity through a
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De-centralized micropower system
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Dispersed, small, local power generating systems
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Micropower
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One or more groups of these suitcase sized generators can be placed in any stream or river without altering its course and be used to produce electricity around the clock
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Micro-hydropower generators
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Uses the temperature differential between the surface and 3-6 meters underground to heat and cool a house.
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Geothermal heat pump
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Can be used in stationary applications like generating electricity or heating buildings, and for powering vehicles, buses, and trains.
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Fuel cells
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The world's largest producer of geothermal energy |
United States |