sources of energy

Oil

petroleum or crude

  • from dead organisms undergo a transformation process
    -activities such as seismic surveying, rock core sampling geologists locate oil reserves
  • petroleum products: gasoline, diesel, jet-fuel, asphalt. causes land disturbance, contributes to global greenhouse gas emission levels.

Coal

  • 4 main types: lignite (25-35% carbon), sub-bituminous (35-45% carbon), bituminous (45-86% carbon), anthracite.

-negative impacts on ecology, human safety issues both for workers and neighbouring communities, cause pollution problems.
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Natural Gas

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  • a source of CO2
  • methane is a potent greenhouse gas
  • colourless, odorless, highly toxic gas
  • highly exposive gas
  • climate change.

hydropower

CO2 emissions

possible damm failures

wind power

expensive, wind not always

windmills

geothermal

expensive, emissions

tidal power

mismatch with daily consumption