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3.3 Energy resources
Topic 3: Human population, carrying capacity and resource
                          use
Topic 3: Human population, carrying
capacity and resource use
3.3: Energy resources

3.3.1: Available Energy Resources
All energy on the planet
comes either directly or      Simplified view of
                              Energy Pathways                           Solar
                                                                       Radiation
                                                                                      Light reflected



indirectly from the sun
                                                                                    from atmosphere



                                                                                                                       Green House Effect
                             Atmosphere
                                                                                                            Energy
                                                                                                         released as
                                                                                                         "IR" (HEAT)
                                                    Light absorbed                   Light absorbed
                                                       by plants                       by surfaces
                                                                                               Particles gain
                                                                                             energy and move
                                                  Photosynthesis                               more rapidly



                                                   "DRIVES"                              "DRIVES"
                                                   Biological                             Physical
                                                   Processes                             Processes


                                          Life Processes
                                           Food chains                             Atmospheric circulation

                                                Eventual dissipation                  Oceanic currents
                                                     as heat
                                                                                        Water cycle
                                                  Fossilisation
                                                  "energy sink"
Topic 3: Human population, carrying
capacity and resource use
3.3: Energy resources

3.3.1: Available Energy Resources


    Energy resources can be classified as either:

    Renewable or

    Non renewable
Topic 3: Human population, carrying
capacity and resource use
3.3: Energy resources

3.3.1: Available Energy Resources

Non renewable energy resources:

Fossil fuels - oil, natural gas and coal

Nuclear energy
Topic 3: Human population, carrying
capacity and resource use
3.3: Energy resources

3.3.1: Available Energy Resources

Renewable energy
resources:

Wind.                  Biomass.

Wave.                  Hydroelectric.

Solar.                 Geothermal.
Topic 3: Human population, carrying
capacity and resource use
3.3: Energy resources

3.3.1: Available Energy Resources
Global energy use
                                  Energy source   Approximate
                                                  global usage
                                                      (%)
                Non- renewable   Oil                          38
                                 Coal                        25
                                 Natural Gas                 22
                                 Uranium                      5


               Renewable         Biomass (wood)               3
                                 Hydroelectric                3
                                 Wind                         2
                                 Solar                        2
                                 Wave                         2
Topic 3: Human population, carrying
capacity and resource use
3.3: Energy resources

3.3.2: Evaluating Energy Resources
Advantages and disadvantages of a particular energy
resource can be group into three broad areas:

Economic
Environmental
Social
Topic 3: Human population, carrying
capacity and resource use
3.3: Energy resources

3.3.2: Evaluating Energy Resources
                                            Pathways of Soil Erosion in the Sahel
                                                                Increasing
                                                                population




Economic, Environmental and Social                              More food
                                                                required



factors for any resources changes with the           More
                                                                                More fuel
                                                                               Increased


context in which the resource is used.
                                                                               needed for
                                                  livestock                      grazing
                                                                                cooking




                                                  More fuel
                                                 Increased                    Deforestation
                                                 needed for
                                                   grazing


Using wood as the main fuel source for
                                                                              for firewood
                                                  cooking




cooking may not have a major impact in a                       Removal of
                                                               vegetation




heavily forested scandinavian country but                     Soil exposed
                                                              to wind and



in saharan Africa it would
                                                                  water




                                                               Top soil can
                                                                blow away




                                                              SOIL EROSION
Topic 3: Human population, carrying
capacity and resource use
3.3: Energy resources

3.3.2: Evaluating Energy Resources
Oil- Advantages
Extraction technology is    Large oil reserves still
well developed              exist

Can be                      Oil provides more ethan
transported relatively ch   just an energy source -
eaply and in large          e.g. Plastics
amounts
                            Efficient energy source
Topic 3: Human population, carrying
capacity and resource use
3.3: Energy resources

3.3.2: Evaluating Energy Resources
Oil- Disadvantages
Most of the worlds oil reserves      Accidents in extraction and
tend to be where consumption is      transport can lead to pollution
low and not spread evenly around     causing habitat destruction
the planet
                                     Expense of dealing with pollution
Combustion of oil leads to
climate change through the           As supply is used up newer supply
release of carbon dioxide            sources are more difficult to
                                     extract due to where they are
                                     (Arctic) or the form in which the
                                     oil exists (shale tar)
Topic 3: Human population, carrying
capacity and resource use
3.3: Energy resources

3.3.2: Evaluating Energy Resources
Solar power - Advantages
Sunlight is free             Can operate on small scale
                             as well as large
Does not produce green
house gases

When used for heating well
insulated houses can be
cheaper than coal or oil
Topic 3: Human population, carrying
capacity and resource use
3.3: Energy resources

3.3.2: Evaluating Energy Resources
Solar power - Disadvantages
Only useful were sunlight is     Aesthetically problematic in
plentiful - not very effective   rural areas
during Northern
Hemisphere winter                Technology still expensive

Takes up a lot of space for
commercial solar harvesting
Topic 3: Human population, carrying
capacity and resource use
3.3: Energy resources

3.3.3: Choice of Energy Resources
The choice of energy sources that a nation or society
uses is very much dependent upon several factors:

Availability                   Historical use

Cost                           Industrial need

Technology                     National politics
Topic 3: Human population, carrying
capacity and resource use
3.3: Energy resources

3.3.3: Choice of Energy Resources

France is a good example of a Nation whose
energy policy has changed over time.

Energy use in France is mainly for the
commercial production of electricity and fuel
for homes and transport
Topic 3: Human population, carrying
capacity and resource use
3.3: Energy resources

3.3.3: Choice of Energy Resources

Traditionally Frances main energy
requirements were filled by coal

Mainly from the French Coal fields in Alsace,
Lorraine and Nord Pas de Calais
Topic 3: Human population, carrying
capacity and resource use
3.3: Energy resources

3.3.3: Choice of Energy Resources

Increasing coast of production resulted in
France looking for alternatives to coal

Unlike the UK or Norway France has no oil
reserves of its own, so if coal was replaced
with oil national energy security would be
dependent upon an imported energy resource
Topic 3: Human population, carrying
capacity and resource use
3.3: Energy resources

3.3.3: Choice of Energy Resources

The answer for France was to invest heavily in
Nuclear power
75% of all France’s energy needs are met by Nuclear
power
France produces so much electricity from Nuclear
power that it exports 18% of its production
Topic 3: Human population, carrying
capacity and resource use
3.3: Energy resources

3.3.3: Choice of Energy Resources
                      Nuclear Reactors in France
Topic 3: Human population, carrying
capacity and resource use
3.3: Energy resources

3.3.3: Choice of Energy Resources




                  Golfech Nuclear Reactor
                  http://www.flickr.com/photos/26106240@N06/2909771892/lightbox/
Topic 3: Human population, carrying
capacity and resource use
3.3: Energy resources

3.3.3: Choice of Energy Resources

Following the Fukushima Nuclear
Accident in 2011, concerns have been
raised over the safety of Nuclear
power.
Partly because of this France has
increased its development of alternative
energy sources.

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Energy resources

  • 1. 3.3 Energy resources Topic 3: Human population, carrying capacity and resource use
  • 2. Topic 3: Human population, carrying capacity and resource use 3.3: Energy resources 3.3.1: Available Energy Resources All energy on the planet comes either directly or Simplified view of Energy Pathways Solar Radiation Light reflected indirectly from the sun from atmosphere Green House Effect Atmosphere Energy released as "IR" (HEAT) Light absorbed Light absorbed by plants by surfaces Particles gain energy and move Photosynthesis more rapidly "DRIVES" "DRIVES" Biological Physical Processes Processes Life Processes Food chains Atmospheric circulation Eventual dissipation Oceanic currents as heat Water cycle Fossilisation "energy sink"
  • 3. Topic 3: Human population, carrying capacity and resource use 3.3: Energy resources 3.3.1: Available Energy Resources Energy resources can be classified as either: Renewable or Non renewable
  • 4. Topic 3: Human population, carrying capacity and resource use 3.3: Energy resources 3.3.1: Available Energy Resources Non renewable energy resources: Fossil fuels - oil, natural gas and coal Nuclear energy
  • 5. Topic 3: Human population, carrying capacity and resource use 3.3: Energy resources 3.3.1: Available Energy Resources Renewable energy resources: Wind. Biomass. Wave. Hydroelectric. Solar. Geothermal.
  • 6. Topic 3: Human population, carrying capacity and resource use 3.3: Energy resources 3.3.1: Available Energy Resources Global energy use Energy source Approximate global usage (%) Non- renewable Oil 38 Coal 25 Natural Gas 22 Uranium 5 Renewable Biomass (wood) 3 Hydroelectric 3 Wind 2 Solar 2 Wave 2
  • 7. Topic 3: Human population, carrying capacity and resource use 3.3: Energy resources 3.3.2: Evaluating Energy Resources Advantages and disadvantages of a particular energy resource can be group into three broad areas: Economic Environmental Social
  • 8. Topic 3: Human population, carrying capacity and resource use 3.3: Energy resources 3.3.2: Evaluating Energy Resources Pathways of Soil Erosion in the Sahel Increasing population Economic, Environmental and Social More food required factors for any resources changes with the More More fuel Increased context in which the resource is used. needed for livestock grazing cooking More fuel Increased Deforestation needed for grazing Using wood as the main fuel source for for firewood cooking cooking may not have a major impact in a Removal of vegetation heavily forested scandinavian country but Soil exposed to wind and in saharan Africa it would water Top soil can blow away SOIL EROSION
  • 9. Topic 3: Human population, carrying capacity and resource use 3.3: Energy resources 3.3.2: Evaluating Energy Resources Oil- Advantages Extraction technology is Large oil reserves still well developed exist Can be Oil provides more ethan transported relatively ch just an energy source - eaply and in large e.g. Plastics amounts Efficient energy source
  • 10. Topic 3: Human population, carrying capacity and resource use 3.3: Energy resources 3.3.2: Evaluating Energy Resources Oil- Disadvantages Most of the worlds oil reserves Accidents in extraction and tend to be where consumption is transport can lead to pollution low and not spread evenly around causing habitat destruction the planet Expense of dealing with pollution Combustion of oil leads to climate change through the As supply is used up newer supply release of carbon dioxide sources are more difficult to extract due to where they are (Arctic) or the form in which the oil exists (shale tar)
  • 11. Topic 3: Human population, carrying capacity and resource use 3.3: Energy resources 3.3.2: Evaluating Energy Resources Solar power - Advantages Sunlight is free Can operate on small scale as well as large Does not produce green house gases When used for heating well insulated houses can be cheaper than coal or oil
  • 12. Topic 3: Human population, carrying capacity and resource use 3.3: Energy resources 3.3.2: Evaluating Energy Resources Solar power - Disadvantages Only useful were sunlight is Aesthetically problematic in plentiful - not very effective rural areas during Northern Hemisphere winter Technology still expensive Takes up a lot of space for commercial solar harvesting
  • 13. Topic 3: Human population, carrying capacity and resource use 3.3: Energy resources 3.3.3: Choice of Energy Resources The choice of energy sources that a nation or society uses is very much dependent upon several factors: Availability Historical use Cost Industrial need Technology National politics
  • 14. Topic 3: Human population, carrying capacity and resource use 3.3: Energy resources 3.3.3: Choice of Energy Resources France is a good example of a Nation whose energy policy has changed over time. Energy use in France is mainly for the commercial production of electricity and fuel for homes and transport
  • 15. Topic 3: Human population, carrying capacity and resource use 3.3: Energy resources 3.3.3: Choice of Energy Resources Traditionally Frances main energy requirements were filled by coal Mainly from the French Coal fields in Alsace, Lorraine and Nord Pas de Calais
  • 16. Topic 3: Human population, carrying capacity and resource use 3.3: Energy resources 3.3.3: Choice of Energy Resources Increasing coast of production resulted in France looking for alternatives to coal Unlike the UK or Norway France has no oil reserves of its own, so if coal was replaced with oil national energy security would be dependent upon an imported energy resource
  • 17. Topic 3: Human population, carrying capacity and resource use 3.3: Energy resources 3.3.3: Choice of Energy Resources The answer for France was to invest heavily in Nuclear power 75% of all France’s energy needs are met by Nuclear power France produces so much electricity from Nuclear power that it exports 18% of its production
  • 18. Topic 3: Human population, carrying capacity and resource use 3.3: Energy resources 3.3.3: Choice of Energy Resources Nuclear Reactors in France
  • 19. Topic 3: Human population, carrying capacity and resource use 3.3: Energy resources 3.3.3: Choice of Energy Resources Golfech Nuclear Reactor http://www.flickr.com/photos/26106240@N06/2909771892/lightbox/
  • 20. Topic 3: Human population, carrying capacity and resource use 3.3: Energy resources 3.3.3: Choice of Energy Resources Following the Fukushima Nuclear Accident in 2011, concerns have been raised over the safety of Nuclear power. Partly because of this France has increased its development of alternative energy sources.

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