HYDROPOWER DISADVANTAGES

• Requires flowing water
• Can interfere with view
• disrupts the ecosystem
• People moved to make way
• Reservoirs can fill with dirt and become useless.

HYDROPOWER DISADVANTAGES

• The dam will change the habitat and landscape upstream
• The land below the dam is also affected as the flow of water is reduces
• Building the dam is expensive and time taking
• High investment cost
• In the great Johnstown flood in Pennsylvania 2,000 people were killed

HYDROPOWER DISADVANTAGES

• In some cases, there are changes in stream water quality
• Precipitation dependant
• Sediment can build up behind Dams and break them, killing people

SOLAR ENERGY ADVANTAGES

• Free source
• Renewable
• Produces no pollutants
• Can be used in remote areas
• Silent

SOLAR ENERGY DISADVANTAGES

• Weather and climate dependant
• Expensive
• Not very efficient
• Doesn't work in the dark
• Fossil fuels are used for some solar collectors.

WIND DISADVANTAGES

• Depends on weather patterns
• Endangers bird populations
• Depends on location
• Noisy
• Largest turbine creates electricity for 475 homes

FOSSIL FUELS ADVANTAGES

• Used by functioning power plants world wide
• Currently plentiful
• Relatively cheap
• Due to inflation, gas prices have actually
• dropped about 50 cents

FOSSIL FUELS DISADVANTAGES

• Releases greenhouse gases
• Limited supply
• Oil spills amount to 1 billion gallons every year
• Rising prices
• Acid rain

BIOMASS ADVANTAGES

• Renewable
• Widely available, many sources
• Reduces garbage
• Provides farmers with a steady market
• Require no equipmant

BIOMASS DISADVANTAGES

• Runs on fossil fuels
• Less pollution,but still pollution
• Collection of biomass can be time-consuming
• Use fuel inefficiently
• Leads to forests cut down

GEOTHERMAL ADVANTAGES

• Non polluting
• Renewable
• Produces constant energy
• Don't take up much room
• No extra charge is needed to keep it running

ENERGY SOURCES

WIND ADVANTAGES

• Renewable
• Non polluting
• Free source
• Easy to build
• More birds are killed by cats and pesticides than by wind turbines

GEOTHERMAL DISADVANTAGES

• Only available in localized areas
• Requires to replan home heating
• Expensive new technology
• When drilling, hazardous gases can escape
• Sometimes runs out of steam

NUCLEAR ADVANTAGES

• Produces no greenhouse gases
• Lot of energy from small fuel
• Clean, no carbon dioxide
• Huge amounts of constant energy
• Can't become a nuke

NUCLEAR DISADVANTAGES

• Waste remains dangerous for centuries
• Limited life span for power plants
• Very expensive
• Uranium will eventually run out
• Storage of radioactive waste Is unsolved

HYDROPOWER ADVANTAGES

• Renewable
• Generally no required fuel
• Constant energy
• Cheap
• No pollution