Studied by 11 peopleClear cutting
can cause soil erosion, water pollution, and loss of wildlife habitat.
Mimic natures
________ reliance on biodiversity by diversifying energy sources.
Photovoltaic (PV) cells
Convert solar energy to electric energy.
Cellulosic ethanol
Produced from cellulose.
European Union countries
________ produce 95 % of the worlds biodiesel.
Geothermal heat pump system
Energy efficient and reliable, environmentally clean, and cost-effective to heat or cool a space.
Hydrogen
Eliminates most of the air pollution problems and reduces global warming threat.
Ethanol
Can be made from sugarcane, corn, switchgrass, and various wastes.
Recycle
________ and reuse materials to reduce consumption of energy.
Crops
________ require large amounts of land.
Biodiesel
Produced from vegetable oil.
Living or green roofs
With specially designed soil and vegetation.
Fuel crops
can compete with food crops for land and raise food prices.
Active solar heating system
Captures energy from the sun in a heat- absorbing fluid.
Passive solar heating system
Absorbs and stores heat from the sun directly within a well- insulated structure.
Wind energy
wind farms convert to electrical energy
Energy efficiency
How much helpful work we get from each unit of energy
Cogeneration
Combined heat and power or two forms of energy from the same fuel source
Living or green roofs
With specially designed soil and vegetation
Superinsulation
No need for a heating system
Passive solar heating system
Absorbs and stores heat from the sun directly within a well-insulated structure
Active solar heating system
Captures energy from the sun in a heat-absorbing fluid
Photovoltaic (PV) cells
Convert solar energy to electric energy
Design of solar cells
Sunlight hits cells and releases electrons into wires
Hydropower
Uses kinetic energy of moving water and is an indirect form of solar energy
Micro-hydropower generators
floating turbines
Biomass
Plant materials and animal waste we can burn or turn into biofuels
Production of solid mass fuel
Plant fast-growing trees; biomass plantations Collect crop residues and animal manure
Biodiesel
Produced from vegetable oil
Ethanol
Can be made from sugarcane, corn, switchgrass, and various wastes
Cellulosic ethanol
Produced from cellulose
Geothermal Energy Heat Storage
Soil, underground rocks, and fluids in the earths mantle
Geothermal heat pump system
Energy efficient and reliable, environmentally clean, and cost-effective to heat or cool a space
Hydrothermal reservoirs
Drill wells and extract various steams, water
Dry
or wet-steam geothermal reservoirs could be depleted
Hydrogen
Eliminates most of the air pollution problems and reduces global warming threat
Chemically locked in water and organic compounds
net negative energy yield
Wind energy
wind farms convert to electrical energy
Energy efficiency
How much helpful work we get from each unit of energy
Cogeneration
Combined heat and power or two forms of energy from the same fuel source
Superinsulation
No need for a heating system
Design of solar cells
Sunlight hits cells and releases electrons into wires
Hydropower
Uses kinetic energy of moving water and is an indirect form of solar energy
Biomass
Plant materials and animal waste we can burn or turn into biofuels
Hydrothermal reservoirs
Drill wells and extract various steams, water
Geothermal Energy Heat Storage
Soil, underground rocks, and fluids in the earth’s mantle
Note 
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