finite + renewable resources

• natural resources come from the earth, sea and air
• Natural resources form without human input
• Fossil fuels are non-renewable because it takes millions of years to make them.
• Renewable energy sources can be replenished quickly so they will never run out.
• The main advantage of using renewables is that they do not produce greenhouse gases which contribute to global warming.
• The main types of fossil fuel are coal, oil and gas.
• Coal is formed when dead plants are buried under layers of mud and rock over millions of years.
• Non-renewable means there is only a limited supply available.
• Renewable resources can be replenished by natural processes