ENERGY RESOURCES
Types:
* non-renewable or exhaustible: a resource which exists in a fixed
amount in various places in the Earth's crust.
energy resources: coal, oil, natural gas, nuclear
**may not be completely exhausted, but economically depleted. Cost of extracting
is greater than the monetary profit
** Some of these can have their supplies extended by
Reusing and/or Recycling
** depletion time: the time it takes to use a certain fraction, usually 80% of the
known or estimated supply of a non-renewable resource.
* perpetual: a resource that is essentially inexhaustible on a human time scale
energy resources: solar energy, wind, hydropower, geothermal
* renewable or potentially renewable: a resource which can be replenished fairly
rapidly through natural processes on a human time scale (hours or years or decades)
energy resources: Biomass (trees, other plants, animals)
Non-Renewable Energy Resources:
Fossil Fuels:
* coal: solid combustible mixture of organic compounds, with water, sulfur and
nitrogen compounds. It forms from the remains of plants subjected to heat
& pressure over millions of years.
* 30-98% carbon by weight
Who controls it (where is it)?
