Fossil fuels are ______ sources of energy.

The correct answer is non-renewable.

Key Points Non-Renewable resources

• The sources that cannot be replaced or reused once they are destroyed are called non-renewable resources.
• These are limited resources.
• These are not environmentally friendly because the amount of carbon emission is high.
• The cost of these resources is high.
• They are not pollution-free.
• They require low maintenance costs.
• Fossil fuels are non-renewable sources of energy.
• Coal, Oil, Nuclear energy, Petroleum, Natural gas, Batteries, Shale gas, and Phosphate are some examples​

Additional Information

• Renewable resources
  • Resources that are used by humans since human life exists.
  • These resources are used by our ancestors for their daily purposes like lighting, shelter, transportation, cooking, heating, protection from harm.
  • These are also known as non-conventional sources of energy.
  • For example Soil, water bodies, sun, wind, tidal energy, geothermal, forest, mountains, wildlife, atmospheric resources.
  • These can be used unlimited.
  • They are environmentally friendly.
  • The cost is low.
  • They are pollution-free.
  • They require high maintenance costs.
  • They are sustainable resources.
  • They cause no harm to life to exist on earth.