Fossil Fuels and Electricity

Definition and Core Concepts of Fossil Fuels

• Fossil Fuels Definition: Fossil fuels are the remains of dead plants and animals that store energy from the Sun from millions of years ago.
• Primary Examples:
  • Coal
  • Oil
  • Natural gas
• Solar Energy Origin:
  • The energy stored within fossil fuels originally came from the Sun.
  • Millions of years ago, ancient plants and animals absorbed and stored energy provided by the Sun.

Formation Process of Fossil Fuels

• Key Environmental Factors:
  • Pressure: Immense pressure exerted from overburden layers of dirt, soil, and sediment above.
  • Heat: Geothermal heat emanating from within the Earth.
  • Duration: The transformation requires extreme heat and pressure sustained over millions of years.
• Sequential Stages in Coal Formation:
  1. Dead Plant Accumulation: Organic plant material dies and accumulates in wet or boggy environments.
  2. Sedimentation Layering: Layers of dirt and sediment accumulate over the dead plant matter, applying downward pressure.
  3. Lignite Formation: Heat and pressure transform compressed plant matter into lignite (a soft brown fuel intermediate).
  4. Black Coal Formation: Prolonged extreme heat and deep pressure over millions of years convert lignite into hard black coal underlying deep dirt layers.