1. Where does our Energy come from?

2. Where does our energy come from for…?
Electric light
Mobile phones
Power for your mp3 TV
Hot Water

3. Energy for these things come from Energy Resources, that are converted into energy that we can easily use.
Electricity is the main form of energy that we use and can power or charge what we need energy for.

4. To generate electricity…
You need an energy source, e.g. coal
This is burnt to produce heat or steam
The heat or steam then drives a turbine
The turbine then can drive a generator
The generator then produces electricity
The electricity is then transported in cables to where it is needed

5. Energy Resources can be divided into 2 categories:
Non-Renewable Resources
For example – coal, oil, gas, uranium or lignite
Once used these resources CANNOT be used again
2. Renewable Resources
For example – wind, water or solar
These resources can be used over and over again

6. Non-Renewable Resources: COAL
What is it?
Formed underground from decaying plant material
How much left in the world?
About 200 years
Advantages?
Plenty left
Mining is getting more efficient
Disadvantages?
Pollution: CO2 emissions (linked to global warming), SO2 (linked to acid rain)
Heavy & bulky to transport

7. Non-Renewable Resources: OIL
What is it?
Formed underground from decaying animal and plant material
How much left in the world?
About 40 years!
Advantages?
Quite easy to transport
Efficient in producing energy
Less pollution than coal
Disadvantages?
Not much left
Pollution: air and danger of water pollution through spills

8. Non-Renewable Resources: NATURAL GAS
What is it?
Formed underground from decaying animal and plant material
How much left in the world?
About 60 years
Advantages?
Clean, least polluting of all non-renewables
Easy to transport
Disadvantages?
Some air pollution
Danger of explosions

9. Non-Renewable Resources: NUCLEAR
What is it?
Uses uranium, naturally found in some rocks
How much left in the world?
Not known
Advantages?
Not much waste and few CO2 emissions released, as well as, few other greenhouse gases
Disadvantages?
High cost to build and close down power stations.
Waste is radioactive. Problem with getting rid of waste safely

10. Why is the term, FOSSIL FUEL used for coal, oil, gas and lignite?

11. Renewable Resources: WIND
What is it? It the movement of air from high to low pressure
How much left? Endless
Advantages? No pollution
Disadvantages? Winds change all the
time, not predictable

12. Renewable Resources: SOLAR
What is it? Energy from the sun
How much left? Endless
Advantages? No pollution, can be used in remote areas
Disadvantages? Can be expensive, needs sunlight
At night it doesn’t work

13. Renewable Resources: BIO-ENERGY
What is it? Biomass and Biogas –
fermented animal or plant waste
vegetation from sustainable sources
How much left? Endless
Advantages? Good availability
Disadvantages? Can be expensive to set up

14. Renewable Resources: HYDRO
What is it? Movement of water drives a turbine
How much left? Endless
Advantages? No CO2 emissions, can control flooding and provide a good water supply to an area
Disadvantages? Large areas maybe flooded. Visual and water pollution

15. Renewable Resources: GEOTHERMAL
What is it? Heat from the ground – often used to heat water
How much left? A lot
Advantages? No CO2 emissions
Disadvantages? Expensive and can only be used in certain parts of the world

16. Renewable Resources: WATER & TIDAL
What is it? Movement of sea drives turbines
How much left? Endless
Advantages? Can produce a lot of electricity, no CO2 emissions
Disadvantages? Not many suitable sites

17. Where does our Energy come from?
From renewable and non-renewable energy sources
Renewable energy sources are now increasingly being used
Renewable energy: The future of energy, today!