1. Renewable Energy • Solar Energy • Advantages: Solar energy is free • Solar energy does not cause pollution. • Disadvantages: • Solar cells are expensive to make • Only a small amount of the solar energy is converted to electrical energy. http://www.youtube.com/watch?v=Ja3-JW7cKos

2. Non- Renewable energy • Examples: Oil, Coal, Gas, Turf • Advantages: Easy to get • Reasonably cheap • Disadvantages: Causes greenhouse gases to be emitted. • Polluting the atmosphere. http://www.youtube.com/watch?v=IG7L5lVoqy8

3. Hydroelectricity • Advantages: Does not cause pollution. • Cost effective not expensive to produce electricity. • Disadvantages: Flooding can destroy plant and animal habitats. • Building of dams can cause flooding in valleys where people live. • http://www.youtube.com/watch?v=TW0Md5yrZI4

4. Wind Energy • Advantages: Wind energy is free • Does not cause pollution. • Disadvantages: • No electricity produced on calm days • Large windmills are noisy and spoil the beauty of the countryside. • http://www.youtube.com/watch?v=Fsoa-EvOt7A

5. Nuclear Energy • Advantages: Nuclear fusion would use a fuel in plentiful supply • Would reduce the present level of greenhouse gases • Disadvantages: Danger of explosion • Harmful effects of radioactive waste

6. Conserving Energy • Switching off electrical devices • Install light saving bulbs • Use public transport, walk to school or cycle if possible • Insulation reduces the need to use larger amounts of energy such as oil. • Ireland imports nearly all the fossil fuels that we use to generate electricity. This is unwise.