Energy security-Theory Flashcards
(73 cards)
3 main ways to classify energy
- Renewable
- Non-renewable
- Recyclable resources
Type of energy and issues with coal
-non-renewable
- Releases large amounts of Co2 contributing to
climate change e.g. 2 billion tonnes from USA
plants per year - Carbon capture technology to remove Co2 is
unproven
Type of energy and issues with natural gas
- Non-renewable
- Releases Co2 on use
- Issues of security of supply
Type of energy and issues with nuclear power
- Non-renewable but recyclable
- Health risks and accidents e.g. Chernobyl
- Disposal of radioactive material an issue
Type of energy and issues with oil
- Non-renewable
- Global supplies may have reached their peak
- Release Co2 when burnt
Type of energy and issues with solar
- Renewable
- Availability varies across the globe
- Expensive compared with fossil fuels
Type of energy and issues with Tidal
- Renewable
- Only certain locations suitable
- Technology for large-scale generation unproven
Type of energy and issues with Tidal
- Renewable
- Only certain locations suitable
-Wind energy is variable so hard to manage power
supply
Type of energy and issues with Biomass
-Renewable
-Acts as a carbon sink so combustion releases
carbon dioxide
-Limited potential for large sale generation
Type of energy and issues with Geothermal
- Renewable
- Availability limited to a few locations e.g. Iceland
Type of energy and issues with Hydro-electrcity
- Renewable and recyclable
- Large scale schemes are expensive
- Dam building creates wide scale flooding
The distribution of HEP around the world
China, Canada,Brazil and USA account for 46% of global total
Distribution of coal around the world
-China produced 41.1% of global
coal in 2007
-USA produces 18.7%
Distribution of wind around the world
Germany world
leader at 23.6% Germany, USA and Spain account for
58% globally
Distribution of natural gas around the world
Russia and USA produce 40% of world’s total
Distribution of oil around the world
-In 2007 the Middle East = 30.8% of oil production
-N. America = 16.5%
Saudi Arabia dominates
production
- 12.6% of world’s
total
-Russia accounts for over ½ of
production for Europe and
Eurasia
Physical reasons why energy supply varies across the globe
Deposits of fossil fuels are only found in a limited number of places
- Solar power needs a large number of days a year with strong sunlight
- Large power stations require flat land and stable foundations
Economic reasons why energy supply varies across the globe
- Onshore deposits of oil and gas are cheaper to develop then offshore deposits
- In poor countries foreign direct investment is essential to develop energy resources
- Most accessible and low cost deposits of fossil fuels are developed first
Political reasons why energy supply varies across the globe
-Countries wanting to develop nuclear power need to gain permission from the
International Atomic Energy Agency
-International agreements such as the Kyoto Protocol can influence energy decisions
-HEP schemes on ‘international’ rivers require the agreement of all countries that share
the river
Energy consumption in developing countries
-Most are struggling to pay for their energy
requirements
-Energy demand is influenced by rate of
economic development and rate of population
growth
- In the world 2 billion people lack access to
household electricity
-Traditional biomass in these countries accounts
for 90% of total energy consumption
Energy consumption in MEDCs
-The USA shows huge demands
for energy resources
-Germany and UK have improved
their energy efficiency resulting
in a modest increase in demand
compared with NICs
Energy consumption in NICs
-China accounts for
1/3rd of the growth in
global oil demand
since 2000
-Demand for oil in
China is expected to
rise by 5-7% year
Reasons why energy across the globe has changed over time
Technological developments - nuclear power only been available since 1954
- Increasing national wealth-incomes increase resulting in increasing use of energy
- Changes in demand -Britain’s trains were powered by coal
-Changes in price -Electricity production in UK switched from coal to gas power stations are
they are cheaper to run
-Environmental factors/public opinion-can influence decisions made by governments
Factors that affect energy security
-Physical – exhaustion of reserves or disruption of supply lines
-Environmental – Protests about environmental change caused by exploitation of energy
resources
- Economic – sudden rises in costs of energy forcing increased imports of higher-priced energy
- Geopolitical – political instability in energy-producing regions