• Entry
  • Reader's guide
  • Entries A-Z
  • Subject index

Coal, Clean Technology

Coal is a combustible rock used as a fossil fuel. It is either black or brown. It is composed of carbon, hydrogen, and oxygen. The quantities of hydrogen and oxygen in coal determine which one of the four types it is: ...

    • Loading...
    locked icon

    Sign in to access this content

    Get a 30 day FREE TRIAL

    • Watch videos from a variety of sources bringing classroom topics to life
    • Read modern, diverse business cases
    • Explore hundreds of books and reference titles