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Energy advantage
1
March 04, 2014
Biomass
Can be used to make ethanol,a cleaner fuel than gasoline
Advantages
Can be quickly regrownRenewable energy source
DisadvantagesDoesn't have as much energy as fossil fuels, so more biomass must be burned to get the same amount of energy
Can pollute the air & smells bad
Coal
Power plants and industry work hard to reduce air pollution
Advantages
Burning coal is a cheap way to make electricity
There is a lot of coal in the U.S.
DisadvantagesNonrenewable energy sourceCan pollute the air & produces carbon dioxide (a greenhouse gas)Coal mines can pollute our water
Energy advantage
2
March 04, 2014
Geothermal
Low temp geothermal energy is found everywhere in the US, just a few feet underground
Advantages
Steam is cheap
Renewable energy DisadvantagesGeothermal plants are expensive to build on top of steam reservoirs
Low temperature geothermal systems are a good bargain over the life of the system
Geothermal steam can contain dangerous chemicals, which are sometimes put back into the earth.
Geothermal energy can't be transported over long distances.
Hydropower
Doesn't pollute the air since no fuel is burned.
Advantages
Cheapest way to make electricity. Water is free to use and isn't transported
Renewable energyDisadvantages
Dams can flood a lot of land when builtDams can disturb fish and wildlife habitats
Most of the good places to put hydro dams have been used.
Lakes made by the dam can be used for recreation and help prevent floods.
Energy advantage
3
March 04, 2014
Natural Gas
Expensive to use
Advantages
Is cleaner than gasoline NonRenewable energy
Disadvantages
Burning produces some air pollution and CO2
We have 110 year supply of natural gas at the current prices.
There is more natural gas, but we'll have to pay more to get it.
Petroleum
Advantages Disadvantages
NonRenewable energymakes many products, also used for transportation fuel Burning produces some air
pollution and CO2
Oil spills can harm the land and water
About 1/2 of the oil we need is imported from other countries
Energy advantage
4
March 04, 2014
Propane
Advantages Disadvantages
NonRenewable energyAs a liquid, takes up less space
Portable fuel
Cheap and cleanburningBurning produces some air pollution and CO2
SolarAdvantages Disadvantages
Produces energy all the time
Renewable energy
Photovoltaic cells can change the sun's energy directly into electricity, so can be used where there are no power lines
Electricity from photovoltaic cells can be more expensive than power plants
Is free to useClean energy source
Spread out and hard to capture
Only available when the sun is shining
Can't transport it, can only be used where we find it.
Energy advantage
5
March 04, 2014
SolarPhotovoltaic cells change radiant (light) energy into electricity. When light strikes the cell, the light causes the electrons in the atoms of the solar panel to move. If the solar cell is a part of an electric circuit, an electric current can flow through the circuit. A single cell only produces a little electricity, but many cells together can power a building.
Solar batteries store electrical energy produced by solar cells to use at night when the sun isn't shining.
Solar power plants use reflectors to focus sunlight on a fluid filled pipe. The fluid heats, and the steam turns a turbine to produce electricity.
Uranium
Advantages Disadvantages
Nucleus of an atom has lots of energy
Nonrenewable
No air pollution
Produces dangerous radiation, which lasts for a long time
Where do we store radioactive waste?
Energy advantage
6
March 04, 2014
Wind
AdvantagesDisadvantages
RenewableWind turbines take up a lot of land
Land for wind farms can be used for something else
Is free to use
Is clean energy
Most places don't have enough wind to make electricity, and the wind doesn't always blow
Can't transport wind energy
Noise pollution
Does it hurt the birds and bats?