2.4

• Energy resource


  A source of energy that can be used to generate electricity or power
• Fossil fuels


  Energy resources that were formed millions of years ago from the fossilised remains of sea creatures and plants
• Renewable energy


  Energy produced from sources that are naturally replenished and do not run out
• Non-renewable energy


  Energy that comes from sources which will run out or will not be replenished soon and easily
• Fossil fuels


  They are a non-renewable resource so will eventually run out, and they release greenhouse gases into the atmosphere
• Biofuel is considered carbon neutral because the plants absorb carbon dioxide when they are growing
• Advantages of fossil fuels: easy to obtain, relatively inexpensive, reliable to burn
• Disadvantages of fossil fuels: non-renewable, create pollution and greenhouse gases